diff --git a/fixtures/matrix-extra-toomany.args b/fixtures/matrix-extra-toomany.args
new file mode 100644
index 00000000..6b69595d
--- /dev/null
+++ b/fixtures/matrix-extra-toomany.args
@@ -0,0 +1,2 @@
+--matrix-extra=abc:1,2,3
+--matrix-extra=foo:bar,baz
diff --git a/fixtures/matrix-extra-toomany.bash b/fixtures/matrix-extra-toomany.bash
new file mode 100644
index 00000000..51b97e1e
--- /dev/null
+++ b/fixtures/matrix-extra-toomany.bash
@@ -0,0 +1,520 @@
+# SUCCESS
+# *INFO* Generating Bash script for testing for GHC versions: 8.0.1 8.0.2 8.2.1 8.2.2 8.4.1 8.4.2 8.4.3 8.4.4 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.8.1 8.8.2 8.8.3 8.8.4 8.10.1 8.10.2 8.10.3 8.10.4 8.10.5 8.10.6 8.10.7 9.0.1 9.0.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.2.7 9.2.8 9.4.1 9.4.2 9.4.3 9.4.4 9.4.5 9.4.6 9.4.7 9.4.8 9.6.1 9.6.2 9.6.3 9.6.4 9.6.5 9.6.6 9.6.7 9.8.1 9.8.2 9.8.3 9.8.4 9.10.1 9.10.2 9.12.1 9.12.2 ghcjs-8.4
+#!/bin/bash
+# shellcheck disable=SC2086,SC2016,SC2046
+# REGENDATA ["--matrix-extra=abc:1,2,3","--matrix-extra=foo:bar,baz","bash","matrix-extra-toomany.project"]
+
+set -o pipefail
+
+# Mode
+##############################################################################
+
+if [ "$1" = "indocker" ]; then
+    INDOCKER=true
+    shift
+else
+    INDOCKER=false
+fi
+
+# Run configuration
+##############################################################################
+
+CFG_CABAL_STORE_CACHE=""
+CFG_CABAL_REPO_CACHE=""
+CFG_JOBS="9.12.2 9.12.1 9.10.2 9.10.1 9.8.4 9.8.3 9.8.2 9.8.1 9.6.7 9.6.6 9.6.5 9.6.4 9.6.3 9.6.2 9.6.1 9.4.8 9.4.7 9.4.6 9.4.5 9.4.4 9.4.3 9.4.2 9.4.1 9.2.8 9.2.7 9.2.6 9.2.5 9.2.4 9.2.3 9.2.2 9.2.1 9.0.2 9.0.1 8.10.7 8.10.6 8.10.5 8.10.4 8.10.3 8.10.2 8.10.1 8.8.4 8.8.3 8.8.2 8.8.1 8.6.5 8.6.4 8.6.3 8.6.2 8.6.1 8.4.4 8.4.3 8.4.2 8.4.1 8.2.2 8.2.1 8.0.2 8.0.1"
+CFG_CABAL_UPDATE=false
+
+SCRIPT_NAME=$(basename "$0")
+START_TIME="$(date +'%s')"
+
+XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-$HOME/.config}
+
+# Job configuration
+##############################################################################
+
+GHC_VERSION="non-existing"
+CABAL_VERSION=3.2
+HEADHACKAGE=false
+
+# Locale
+##############################################################################
+
+export LC_ALL=C.UTF-8
+
+# Utilities
+##############################################################################
+
+SGR_RED='\033[1;31m'
+SGR_GREEN='\033[1;32m'
+SGR_BLUE='\033[1;34m'
+SGR_CYAN='\033[1;96m'
+SGR_RESET='\033[0m' # No Color
+
+put_info() {
+    printf "$SGR_CYAN%s$SGR_RESET\n" "### $*"
+}
+
+put_error() {
+    printf "$SGR_RED%s$SGR_RESET\n" "!!! $*"
+}
+
+run_cmd() {
+    local PRETTYCMD="$*"
+    local PROMPT
+    if $INDOCKER; then
+        PROMPT="$(pwd) >>>"
+    else
+        PROMPT=">>>"
+    fi
+
+    printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+
+    local start_time end_time cmd_duration total_duration
+    start_time=$(date +'%s')
+
+    "$@"
+    local RET=$?
+
+    end_time=$(date +'%s')
+    cmd_duration=$((end_time - start_time))
+    total_duration=$((end_time - START_TIME))
+
+    cmd_min=$((cmd_duration / 60))
+    cmd_sec=$((cmd_duration % 60))
+
+    total_min=$((total_duration / 60))
+    total_sec=$((total_duration % 60))
+
+    if [ $RET -eq 0 ]; then
+        printf "$SGR_GREEN%s$SGR_RESET (%dm%02ds; %dm%02ds)\n" "<<< $PRETTYCMD" "$cmd_min" "$cmd_sec" "$total_min" "$total_sec"
+    else
+        printf "$SGR_RED%s$SGR_RESET\n" "!!! $PRETTYCMD"
+        exit 1
+    fi
+}
+
+run_cmd_if() {
+    local COND=$1
+    shift
+
+    if [ $COND -eq 1 ]; then
+        run_cmd "$@"
+    else
+        local PRETTYCMD="$*"
+        local PROMPT
+        PROMPT="$(pwd) (skipping) >>>"
+
+        printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+    fi
+}
+
+run_cmd_unchecked() {
+    local PRETTYCMD="$*"
+    local PROMPT
+    if $INDOCKER; then
+        PROMPT="$(pwd) >>>"
+    else
+        PROMPT=">>>"
+    fi
+
+    printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+
+    local start_time end_time cmd_duration total_duration cmd_min cmd_sec total_min total_sec
+    start_time=$(date +'%s')
+
+    "$@"
+
+    end_time=$(date +'%s')
+    cmd_duration=$((end_time - start_time))
+    total_duration=$((end_time - START_TIME))
+
+    cmd_min=$((cmd_duration / 60))
+    cmd_sec=$((cmd_duration % 60))
+
+    total_min=$((total_duration / 60))
+    total_sec=$((total_duration % 60))
+
+    printf "$SGR_GREEN%s$SGR_RESET (%dm%02ds; %dm%02ds)\n" "<<< $PRETTYCMD" "$cmd_min" "$cmd_sec" "$total_min" "$total_sec"
+}
+
+change_dir() {
+    local DIR=$1
+    if [ -d "$DIR" ]; then
+        printf "$SGR_BLUE%s$SGR_RESET\n" "change directory to $DIR"
+        cd "$DIR" || exit 1
+    else
+        printf "$SGR_RED%s$SGR_RESET\n" "!!! cd $DIR"
+        exit 1
+    fi
+}
+
+change_dir_if() {
+    local COND=$1
+    local DIR=$2
+
+    if [ $COND -ne 0 ]; then
+        change_dir "$DIR"
+    fi
+}
+
+echo_to() {
+    local DEST=$1
+    local CONTENTS=$2
+
+    echo "$CONTENTS" >> "$DEST"
+}
+
+echo_if_to() {
+    local COND=$1
+    local DEST=$2
+    local CONTENTS=$3
+
+    if [ $COND -ne 0 ]; then
+        echo_to "$DEST" "$CONTENTS"
+    fi
+}
+
+install_cabalplan() {
+    put_info "installing cabal-plan"
+
+    if [ ! -e $CABAL_REPOCACHE/downloads/cabal-plan ]; then
+        curl -L https://github.com/haskell-hvr/cabal-plan/releases/download/v0.6.2.0/cabal-plan-0.6.2.0-x86_64-linux.xz > /tmp/cabal-plan.xz || exit 1
+        (cd /tmp && echo "de73600b1836d3f55e32d80385acc055fd97f60eaa0ab68a755302685f5d81bc  cabal-plan.xz" | sha256sum -c -)|| exit 1
+        mkdir -p $CABAL_REPOCACHE/downloads
+        xz -d < /tmp/cabal-plan.xz > $CABAL_REPOCACHE/downloads/cabal-plan || exit 1
+        chmod a+x $CABAL_REPOCACHE/downloads/cabal-plan || exit 1
+    fi
+
+    mkdir -p $CABAL_DIR/bin || exit 1
+    ln -s $CABAL_REPOCACHE/downloads/cabal-plan $CABAL_DIR/bin/cabal-plan || exit 1
+}
+
+# Help
+##############################################################################
+
+show_usage() {
+cat <<EOF
+./haskell-ci.sh - build & test
+
+Usage: ./haskell-ci.sh [options]
+  A script to run automated checks locally (using Docker)
+
+Available options:
+  --jobs JOBS               Jobs to run (default: $CFG_JOBS)
+  --cabal-store-cache PATH  Directory to use for cabal-store-cache
+  --cabal-repo-cache PATH   Directory to use for cabal-repo-cache
+  --skip-cabal-update       Skip cabal update (useful with --cabal-repo-cache)
+  --no-skip-cabal-update
+  --help                    Print this message
+
+EOF
+}
+
+# getopt
+#######################################################################
+
+process_cli_options() {
+    while [ $# -gt 0 ]; do
+        arg=$1
+        case $arg in
+            --help)
+                show_usage
+                exit
+                ;;
+            --jobs)
+                CFG_JOBS=$2
+                shift
+                shift
+                ;;
+            --cabal-store-cache)
+                CFG_CABAL_STORE_CACHE=$2
+                shift
+                shift
+                ;;
+            --cabal-repo-cache)
+                CFG_CABAL_REPO_CACHE=$2
+                shift
+                shift
+                ;;
+            --skip-cabal-update)
+                CFG_CABAL_UPDATE=false
+                shift
+                ;;
+            --no-skip-cabal-update)
+                CFG_CABAL_UPDATE=true
+                shift
+                ;;
+            *)
+                echo "Unknown option $arg"
+                exit 1
+        esac
+    done
+}
+
+process_indocker_options () {
+    while [ $# -gt 0 ]; do
+        arg=$1
+
+        case $arg in
+            --ghc-version)
+                GHC_VERSION=$2
+                shift
+                shift
+                ;;
+            --cabal-version)
+                CABAL_VERSION=$2
+                shift
+                shift
+                ;;
+            --start-time)
+                START_TIME=$2
+                shift
+                shift
+                ;;
+            --cabal-update)
+                CABAL_UPDATE=$2
+                shift
+                shift
+                ;;
+            *)
+                echo "Unknown option $arg"
+                exit 1
+        esac
+    done
+}
+
+if $INDOCKER; then
+    process_indocker_options "$@"
+
+else
+    if [ -f "$XDG_CONFIG_HOME/haskell-ci/bash.config" ]; then
+        process_cli_options $(cat "$XDG_CONFIG_HOME/haskell-ci/bash.config")
+    fi
+
+    process_cli_options "$@"
+
+    put_info "jobs:              $CFG_JOBS"
+    put_info "cabal-store-cache: $CFG_CABAL_STORE_CACHE"
+    put_info "cabal-repo-cache:  $CFG_CABAL_REPO_CACHE"
+    put_info "cabal-update:      $CFG_CABAL_UPDATE"
+fi
+
+# Constants
+##############################################################################
+
+SRCDIR=/hsci/src
+BUILDDIR=/hsci/build
+CABAL_DIR="$BUILDDIR/cabal"
+CABAL_REPOCACHE=/hsci/cabal-repocache
+CABAL_STOREDIR=/hsci/store
+
+# Docker invoke
+##############################################################################
+
+# if cache directory is specified, use it.
+# Otherwise use another tmpfs host
+if [ -z "$CFG_CABAL_STORE_CACHE" ]; then
+    CABALSTOREARG="--tmpfs $CABAL_STOREDIR:exec"
+else
+    CABALSTOREARG="--volume $CFG_CABAL_STORE_CACHE:$CABAL_STOREDIR"
+fi
+
+if [ -z "$CFG_CABAL_REPO_CACHE" ]; then
+    CABALREPOARG="--tmpfs $CABAL_REPOCACHE:exec"
+else
+    CABALREPOARG="--volume $CFG_CABAL_REPO_CACHE:$CABAL_REPOCACHE"
+fi
+
+echo_docker_cmd() {
+    local GHCVER=$1
+
+    # TODO: mount /hsci/src:ro (readonly)
+    echo docker run \
+        --tty \
+        --interactive \
+        --rm \
+        --label haskell-ci \
+        --volume "$(pwd):/hsci/src" \
+        $CABALSTOREARG \
+        $CABALREPOARG \
+        --tmpfs /tmp:exec \
+        --tmpfs /hsci/build:exec \
+        --workdir /hsci/build \
+        "phadej/ghc:$GHCVER-bionic" \
+        "/bin/bash" "/hsci/src/$SCRIPT_NAME" indocker \
+        --ghc-version "$GHCVER" \
+        --cabal-update "$CFG_CABAL_UPDATE" \
+        --start-time "$START_TIME"
+}
+
+# if we are not in docker, loop through jobs
+if ! $INDOCKER; then
+    for JOB in $CFG_JOBS; do
+        put_info "Running in docker: $JOB"
+        run_cmd $(echo_docker_cmd "$JOB")
+    done
+
+    run_cmd echo "ALL OK"
+    exit 0
+fi
+
+# Otherwise we are in docker, and the rest of script executes
+put_info "In docker"
+
+# Environment
+##############################################################################
+
+GHCDIR=/opt/ghc/$GHC_VERSION
+
+HC=$GHCDIR/bin/ghc
+HCPKG=$GHCDIR/bin/ghc-pkg
+HADDOCK=$GHCDIR/bin/haddock
+
+CABAL=/opt/cabal/$CABAL_VERSION/bin/cabal
+
+CABAL="$CABAL -vnormal+nowrap"
+
+export CABAL_DIR
+export CABAL_CONFIG="$BUILDDIR/cabal/config"
+
+PATH="$CABAL_DIR/bin:$PATH"
+
+# HCNUMVER
+HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
+GHCJSARITH=0
+
+put_info "HCNUMVER: $HCNUMVER"
+
+# Args for shorter/nicer commands
+if [ $((GHCJSARITH || ! GHCJSARITH)) -ne 0 ] ; then ARG_TESTS=--enable-tests; else ARG_TESTS=--disable-tests; fi
+if [ $((GHCJSARITH || ! GHCJSARITH)) -ne 0 ] ; then ARG_BENCH=--enable-benchmarks; else ARG_BENCH=--disable-benchmarks; fi
+ARG_COMPILER="--ghc --with-compiler=$HC"
+
+put_info "tests/benchmarks: $ARG_TESTS $ARG_BENCH"
+
+# Apt dependencies
+##############################################################################
+
+
+# Cabal config
+##############################################################################
+
+mkdir -p $BUILDDIR/cabal
+
+cat > $BUILDDIR/cabal/config <<EOF
+remote-build-reporting: anonymous
+write-ghc-environment-files: always
+remote-repo-cache: $CABAL_REPOCACHE
+logs-dir:          $CABAL_DIR/logs
+world-file:        $CABAL_DIR/world
+extra-prog-path:   $CABAL_DIR/bin
+symlink-bindir:    $CABAL_DIR/bin
+installdir:        $CABAL_DIR/bin
+build-summary:     $CABAL_DIR/logs/build.log
+store-dir:         $CABAL_STOREDIR
+install-dirs user
+  prefix: $CABAL_DIR
+repository hackage.haskell.org
+  url: http://hackage.haskell.org/
+EOF
+
+if $HEADHACKAGE; then
+    put_error "head.hackage is not implemented"
+    exit 1
+fi
+
+run_cmd cat "$BUILDDIR/cabal/config"
+
+# Version
+##############################################################################
+
+put_info "Versions"
+run_cmd $HC --version
+run_cmd_unchecked $HC --print-project-git-commit-id
+run_cmd $CABAL --version
+
+# Build script
+##############################################################################
+
+# update cabal index
+if $CABAL_UPDATE; then
+    put_info "Updating Hackage index"
+    run_cmd $CABAL v2-update -v
+fi
+
+# install cabal-plan
+install_cabalplan
+run_cmd cabal-plan --version
+
+# initial cabal.project for sdist
+put_info "initial cabal.project for sdist"
+change_dir "$BUILDDIR"
+run_cmd touch cabal.project
+echo_to cabal.project "packages: $SRCDIR/splitmix"
+run_cmd cat cabal.project
+
+# sdist
+put_info "sdist"
+run_cmd mkdir -p "$BUILDDIR/sdist"
+run_cmd $CABAL sdist all --output-dir "$BUILDDIR/sdist"
+
+# unpack
+put_info "unpack"
+change_dir "$BUILDDIR"
+run_cmd mkdir -p "$BUILDDIR/unpacked"
+run_cmd find "$BUILDDIR/sdist" -maxdepth 1 -type f -name '*.tar.gz' -exec tar -C "$BUILDDIR/unpacked" -xzvf {} \;
+
+# generate cabal.project
+put_info "generate cabal.project"
+PKGDIR_splitmix="$(find "$BUILDDIR/unpacked" -maxdepth 1 -type d -regex '.*/splitmix-[0-9.]*')"
+run_cmd touch cabal.project
+run_cmd touch cabal.project.local
+echo_to cabal.project "packages: ${PKGDIR_splitmix}"
+echo_if_to $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) cabal.project "package splitmix"
+echo_if_to $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) cabal.project "    ghc-options: -Werror=missing-methods"
+cat >> cabal.project <<EOF
+EOF
+$HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(splitmix)$/; }' >> cabal.project.local
+run_cmd cat cabal.project
+run_cmd cat cabal.project.local
+
+# dump install plan
+put_info "dump install plan"
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
+run_cmd cabal-plan
+
+# install dependencies
+put_info "install dependencies"
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j all
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dependencies-only -j all
+
+# build w/o tests
+put_info "build w/o tests"
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+
+# build
+put_info "build"
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all
+
+# tests
+put_info "tests"
+run_cmd_if $((! GHCJSARITH)) $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
+
+# cabal check
+put_info "cabal check"
+change_dir "${PKGDIR_splitmix}"
+run_cmd ${CABAL} -vnormal check
+change_dir "$BUILDDIR"
+
+# haddock
+put_info "haddock"
+run_cmd_if $((! GHCJSARITH)) $CABAL v2-haddock --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all
+
+# unconstrained build
+put_info "unconstrained build"
+run_cmd rm -f cabal.project.local
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+
+
+# Done
+run_cmd echo OK
diff --git a/fixtures/matrix-extra-toomany.github b/fixtures/matrix-extra-toomany.github
new file mode 100644
index 00000000..b1f0f5ea
--- /dev/null
+++ b/fixtures/matrix-extra-toomany.github
@@ -0,0 +1,2 @@
+# FAILURE
+# *ERROR* The matrix has 342 jobs, exceeding the limit of 256.
diff --git a/fixtures/matrix-extra-toomany.project b/fixtures/matrix-extra-toomany.project
new file mode 100644
index 00000000..b1f6a74e
--- /dev/null
+++ b/fixtures/matrix-extra-toomany.project
@@ -0,0 +1 @@
+packages: splitmix
diff --git a/fixtures/matrix-extra-toomany.travis b/fixtures/matrix-extra-toomany.travis
new file mode 100644
index 00000000..c70073f4
--- /dev/null
+++ b/fixtures/matrix-extra-toomany.travis
@@ -0,0 +1,298 @@
+# SUCCESS
+# *INFO* Generating Travis-CI config for testing for GHC versions: 7.0.1 7.0.2 7.0.3 7.0.4 7.2.1 7.2.2 7.4.1 7.4.2 7.6.1 7.6.2 7.6.3 7.8.1 7.8.2 7.8.3 7.8.4 7.10.1 7.10.2 7.10.3 8.0.1 8.0.2 8.2.1 8.2.2 8.4.1 8.4.2 8.4.3 8.4.4 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.8.1 8.8.2 8.8.3 8.8.4 8.10.1 8.10.2 8.10.3 8.10.4 8.10.5 8.10.6 8.10.7 9.0.1 9.0.2 9.2.1 9.2.2 9.2.3 9.2.4 9.4.1 9.4.2 ghcjs-8.4
+# This Travis job script has been generated by a script via
+#
+#   haskell-ci '--matrix-extra=abc:1,2,3' '--matrix-extra=foo:bar,baz' 'travis' 'matrix-extra-toomany.project'
+#
+# To regenerate the script (for example after adjusting tested-with) run
+#
+#   haskell-ci regenerate
+#
+# For more information, see https://github.com/haskell-CI/haskell-ci
+#
+version: ~> 1.0
+language: c
+os: linux
+dist: bionic
+git:
+  # whether to recursively clone submodules
+  submodules: false
+cache:
+  directories:
+    - $HOME/.cabal/packages
+    - $HOME/.cabal/store
+    - $HOME/.hlint
+before_cache:
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
+  # remove files that are regenerated by 'cabal update'
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/00-index.*
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/*.json
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
+  - rm -rfv $CABALHOME/packages/head.hackage
+jobs:
+  include:
+    - compiler: ghcjs-8.4
+      addons: {"apt":{"packages":["ghcjs-8.4","cabal-install-3.4","ghc-8.4.4","nodejs"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"},{"sourceline":"deb http://ppa.launchpad.net/hvr/ghcjs/ubuntu bionic main"},{"key_url":"https://deb.nodesource.com/gpgkey/nodesource.gpg.key","sourceline":"deb https://deb.nodesource.com/node_10.x bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.4.2
+      addons: {"apt":{"packages":["ghc-9.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.4.1
+      addons: {"apt":{"packages":["ghc-9.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.4
+      addons: {"apt":{"packages":["ghc-9.2.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.3
+      addons: {"apt":{"packages":["ghc-9.2.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.2
+      addons: {"apt":{"packages":["ghc-9.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.1
+      addons: {"apt":{"packages":["ghc-9.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.0.2
+      addons: {"apt":{"packages":["ghc-9.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.0.1
+      addons: {"apt":{"packages":["ghc-9.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.7
+      addons: {"apt":{"packages":["ghc-8.10.7","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.6
+      addons: {"apt":{"packages":["ghc-8.10.6","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.5
+      addons: {"apt":{"packages":["ghc-8.10.5","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.4
+      addons: {"apt":{"packages":["ghc-8.10.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.3
+      addons: {"apt":{"packages":["ghc-8.10.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.2
+      addons: {"apt":{"packages":["ghc-8.10.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.1
+      addons: {"apt":{"packages":["ghc-8.10.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.4
+      addons: {"apt":{"packages":["ghc-8.8.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.3
+      addons: {"apt":{"packages":["ghc-8.8.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.2
+      addons: {"apt":{"packages":["ghc-8.8.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.1
+      addons: {"apt":{"packages":["ghc-8.8.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.5
+      addons: {"apt":{"packages":["ghc-8.6.5","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.4
+      addons: {"apt":{"packages":["ghc-8.6.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.3
+      addons: {"apt":{"packages":["ghc-8.6.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.2
+      addons: {"apt":{"packages":["ghc-8.6.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.1
+      addons: {"apt":{"packages":["ghc-8.6.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.4
+      addons: {"apt":{"packages":["ghc-8.4.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.3
+      addons: {"apt":{"packages":["ghc-8.4.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.2
+      addons: {"apt":{"packages":["ghc-8.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.1
+      addons: {"apt":{"packages":["ghc-8.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.2.2
+      addons: {"apt":{"packages":["ghc-8.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.2.1
+      addons: {"apt":{"packages":["ghc-8.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.0.2
+      addons: {"apt":{"packages":["ghc-8.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.0.1
+      addons: {"apt":{"packages":["ghc-8.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.3
+      addons: {"apt":{"packages":["ghc-7.10.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.2
+      addons: {"apt":{"packages":["ghc-7.10.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.1
+      addons: {"apt":{"packages":["ghc-7.10.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.4
+      addons: {"apt":{"packages":["ghc-7.8.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.3
+      addons: {"apt":{"packages":["ghc-7.8.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.2
+      addons: {"apt":{"packages":["ghc-7.8.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.1
+      addons: {"apt":{"packages":["ghc-7.8.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.3
+      addons: {"apt":{"packages":["ghc-7.6.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.2
+      addons: {"apt":{"packages":["ghc-7.6.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.1
+      addons: {"apt":{"packages":["ghc-7.6.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.4.2
+      addons: {"apt":{"packages":["ghc-7.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.4.1
+      addons: {"apt":{"packages":["ghc-7.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.2.2
+      addons: {"apt":{"packages":["ghc-7.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.2.1
+      addons: {"apt":{"packages":["ghc-7.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.4
+      addons: {"apt":{"packages":["ghc-7.0.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.3
+      addons: {"apt":{"packages":["ghc-7.0.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.2
+      addons: {"apt":{"packages":["ghc-7.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.1
+      addons: {"apt":{"packages":["ghc-7.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+before_install:
+  - |
+    if echo $CC | grep -q ghcjs; then
+        GHCJS=true; GHCJSARITH=1;
+    else
+        GHCJS=false; GHCJSARITH=0;
+    fi
+  - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')
+  - WITHCOMPILER="-w $HC"
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then HC=${HC}js ; fi
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then WITHCOMPILER="--ghcjs ${WITHCOMPILER}js" ; fi
+  - HADDOCK=$(echo "/opt/$CC/bin/haddock" | sed 's/-/\//')
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then PATH="/opt/ghc/8.4.4/bin:$PATH" ; fi
+  - HCPKG="$HC-pkg"
+  - unset CC
+  - CABAL=/opt/ghc/bin/cabal
+  - CABALHOME=$HOME/.cabal
+  - export PATH="$CABALHOME/bin:$PATH"
+  - TOP=$(pwd)
+  - "HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')"
+  - echo $HCNUMVER
+  - CABAL="$CABAL -vnormal+nowrap"
+  - set -o pipefail
+  - TEST=--enable-tests
+  - BENCH=--enable-benchmarks
+  - HEADHACKAGE=false
+  - rm -f $CABALHOME/config
+  - |
+    echo "verbose: normal +nowrap +markoutput"          >> $CABALHOME/config
+    echo "remote-build-reporting: anonymous"            >> $CABALHOME/config
+    echo "write-ghc-environment-files: never"           >> $CABALHOME/config
+    echo "remote-repo-cache: $CABALHOME/packages"       >> $CABALHOME/config
+    echo "logs-dir:          $CABALHOME/logs"           >> $CABALHOME/config
+    echo "world-file:        $CABALHOME/world"          >> $CABALHOME/config
+    echo "extra-prog-path:   $CABALHOME/bin"            >> $CABALHOME/config
+    echo "symlink-bindir:    $CABALHOME/bin"            >> $CABALHOME/config
+    echo "installdir:        $CABALHOME/bin"            >> $CABALHOME/config
+    echo "build-summary:     $CABALHOME/logs/build.log" >> $CABALHOME/config
+    echo "store-dir:         $CABALHOME/store"          >> $CABALHOME/config
+    echo "install-dirs user"                            >> $CABALHOME/config
+    echo "  prefix: $CABALHOME"                         >> $CABALHOME/config
+    echo "repository hackage.haskell.org"               >> $CABALHOME/config
+    echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config
+install:
+  - ${CABAL} --version
+  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - node --version
+  - echo $GHCJS
+  - |
+    echo "program-default-options"                >> $CABALHOME/config
+    echo "  ghc-options: $GHCJOBS +RTS -M6G -RTS" >> $CABALHOME/config
+  - cat $CABALHOME/config
+  - rm -fv cabal.project cabal.project.local cabal.project.freeze
+  - travis_retry ${CABAL} v2-update -v
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: splitmix" >> cabal.project
+  - if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo 'package splitmix' >> cabal.project ; fi
+  - "if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo '  ghc-options: -Werror=missing-methods' >> cabal.project ; fi"
+  - ""
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(splitmix)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  - if [ -f "splitmix/configure.ac" ]; then (cd "splitmix" && autoreconf -i); fi
+  - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH}
+  - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
+  - rm  cabal.project.freeze
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} --dep -j2 all
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --dep -j2 all
+script:
+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
+  # Packaging...
+  - ${CABAL} v2-sdist all
+  # Unpacking...
+  - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
+  - cd ${DISTDIR} || false
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm       '{}' \;
+  - PKGDIR_splitmix="$(find . -maxdepth 1 -type d -regex '.*/splitmix-[0-9.]*')"
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: ${PKGDIR_splitmix}" >> cabal.project
+  - if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo 'package splitmix' >> cabal.project ; fi
+  - "if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo '  ghc-options: -Werror=missing-methods' >> cabal.project ; fi"
+  - ""
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(splitmix)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  # Building...
+  # this builds all libraries and executables (without tests/benchmarks)
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
+  # Building with tests and benchmarks...
+  # build & run tests, build benchmarks
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all --write-ghc-environment-files=always
+  # Testing...
+  - if [ $((! GHCJSARITH)) -ne 0 ] ; then ${CABAL} v2-test $WITHCOMPILER ${TEST} ${BENCH} all --test-show-details=direct ; fi
+  # cabal check...
+  - (cd ${PKGDIR_splitmix} && ${CABAL} -vnormal check)
+  # haddock...
+  - if [ $((! GHCJSARITH)) -ne 0 ] ; then ${CABAL} v2-haddock --haddock-all $WITHCOMPILER --with-haddock $HADDOCK ${TEST} ${BENCH} all ; fi
+  # Building without installed constraints for packages in global-db...
+  - rm -f cabal.project.local
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
+
+# REGENDATA ["--matrix-extra=abc:1,2,3","--matrix-extra=foo:bar,baz","travis","matrix-extra-toomany.project"]
+# EOF
diff --git a/fixtures/matrix-extra.args b/fixtures/matrix-extra.args
new file mode 100644
index 00000000..494b38c8
--- /dev/null
+++ b/fixtures/matrix-extra.args
@@ -0,0 +1,2 @@
+--matrix-extra=abc:1,2
+--matrix-extra=foo:bar,baz
diff --git a/fixtures/matrix-extra.bash b/fixtures/matrix-extra.bash
new file mode 100644
index 00000000..e6e50884
--- /dev/null
+++ b/fixtures/matrix-extra.bash
@@ -0,0 +1,520 @@
+# SUCCESS
+# *INFO* Generating Bash script for testing for GHC versions: 8.0.1 8.0.2 8.2.1 8.2.2 8.4.1 8.4.2 8.4.3 8.4.4 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.8.1 8.8.2 8.8.3 8.8.4 8.10.1 8.10.2 8.10.3 8.10.4 8.10.5 8.10.6 8.10.7 9.0.1 9.0.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.2.7 9.2.8 9.4.1 9.4.2 9.4.3 9.4.4 9.4.5 9.4.6 9.4.7 9.4.8 9.6.1 9.6.2 9.6.3 9.6.4 9.6.5 9.6.6 9.6.7 9.8.1 9.8.2 9.8.3 9.8.4 9.10.1 9.10.2 9.12.1 9.12.2 ghcjs-8.4
+#!/bin/bash
+# shellcheck disable=SC2086,SC2016,SC2046
+# REGENDATA ["--matrix-extra=abc:1,2","--matrix-extra=foo:bar,baz","bash","matrix-extra.project"]
+
+set -o pipefail
+
+# Mode
+##############################################################################
+
+if [ "$1" = "indocker" ]; then
+    INDOCKER=true
+    shift
+else
+    INDOCKER=false
+fi
+
+# Run configuration
+##############################################################################
+
+CFG_CABAL_STORE_CACHE=""
+CFG_CABAL_REPO_CACHE=""
+CFG_JOBS="9.12.2 9.12.1 9.10.2 9.10.1 9.8.4 9.8.3 9.8.2 9.8.1 9.6.7 9.6.6 9.6.5 9.6.4 9.6.3 9.6.2 9.6.1 9.4.8 9.4.7 9.4.6 9.4.5 9.4.4 9.4.3 9.4.2 9.4.1 9.2.8 9.2.7 9.2.6 9.2.5 9.2.4 9.2.3 9.2.2 9.2.1 9.0.2 9.0.1 8.10.7 8.10.6 8.10.5 8.10.4 8.10.3 8.10.2 8.10.1 8.8.4 8.8.3 8.8.2 8.8.1 8.6.5 8.6.4 8.6.3 8.6.2 8.6.1 8.4.4 8.4.3 8.4.2 8.4.1 8.2.2 8.2.1 8.0.2 8.0.1"
+CFG_CABAL_UPDATE=false
+
+SCRIPT_NAME=$(basename "$0")
+START_TIME="$(date +'%s')"
+
+XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-$HOME/.config}
+
+# Job configuration
+##############################################################################
+
+GHC_VERSION="non-existing"
+CABAL_VERSION=3.2
+HEADHACKAGE=false
+
+# Locale
+##############################################################################
+
+export LC_ALL=C.UTF-8
+
+# Utilities
+##############################################################################
+
+SGR_RED='\033[1;31m'
+SGR_GREEN='\033[1;32m'
+SGR_BLUE='\033[1;34m'
+SGR_CYAN='\033[1;96m'
+SGR_RESET='\033[0m' # No Color
+
+put_info() {
+    printf "$SGR_CYAN%s$SGR_RESET\n" "### $*"
+}
+
+put_error() {
+    printf "$SGR_RED%s$SGR_RESET\n" "!!! $*"
+}
+
+run_cmd() {
+    local PRETTYCMD="$*"
+    local PROMPT
+    if $INDOCKER; then
+        PROMPT="$(pwd) >>>"
+    else
+        PROMPT=">>>"
+    fi
+
+    printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+
+    local start_time end_time cmd_duration total_duration
+    start_time=$(date +'%s')
+
+    "$@"
+    local RET=$?
+
+    end_time=$(date +'%s')
+    cmd_duration=$((end_time - start_time))
+    total_duration=$((end_time - START_TIME))
+
+    cmd_min=$((cmd_duration / 60))
+    cmd_sec=$((cmd_duration % 60))
+
+    total_min=$((total_duration / 60))
+    total_sec=$((total_duration % 60))
+
+    if [ $RET -eq 0 ]; then
+        printf "$SGR_GREEN%s$SGR_RESET (%dm%02ds; %dm%02ds)\n" "<<< $PRETTYCMD" "$cmd_min" "$cmd_sec" "$total_min" "$total_sec"
+    else
+        printf "$SGR_RED%s$SGR_RESET\n" "!!! $PRETTYCMD"
+        exit 1
+    fi
+}
+
+run_cmd_if() {
+    local COND=$1
+    shift
+
+    if [ $COND -eq 1 ]; then
+        run_cmd "$@"
+    else
+        local PRETTYCMD="$*"
+        local PROMPT
+        PROMPT="$(pwd) (skipping) >>>"
+
+        printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+    fi
+}
+
+run_cmd_unchecked() {
+    local PRETTYCMD="$*"
+    local PROMPT
+    if $INDOCKER; then
+        PROMPT="$(pwd) >>>"
+    else
+        PROMPT=">>>"
+    fi
+
+    printf "$SGR_BLUE%s %s$SGR_RESET\n" "$PROMPT" "$PRETTYCMD"
+
+    local start_time end_time cmd_duration total_duration cmd_min cmd_sec total_min total_sec
+    start_time=$(date +'%s')
+
+    "$@"
+
+    end_time=$(date +'%s')
+    cmd_duration=$((end_time - start_time))
+    total_duration=$((end_time - START_TIME))
+
+    cmd_min=$((cmd_duration / 60))
+    cmd_sec=$((cmd_duration % 60))
+
+    total_min=$((total_duration / 60))
+    total_sec=$((total_duration % 60))
+
+    printf "$SGR_GREEN%s$SGR_RESET (%dm%02ds; %dm%02ds)\n" "<<< $PRETTYCMD" "$cmd_min" "$cmd_sec" "$total_min" "$total_sec"
+}
+
+change_dir() {
+    local DIR=$1
+    if [ -d "$DIR" ]; then
+        printf "$SGR_BLUE%s$SGR_RESET\n" "change directory to $DIR"
+        cd "$DIR" || exit 1
+    else
+        printf "$SGR_RED%s$SGR_RESET\n" "!!! cd $DIR"
+        exit 1
+    fi
+}
+
+change_dir_if() {
+    local COND=$1
+    local DIR=$2
+
+    if [ $COND -ne 0 ]; then
+        change_dir "$DIR"
+    fi
+}
+
+echo_to() {
+    local DEST=$1
+    local CONTENTS=$2
+
+    echo "$CONTENTS" >> "$DEST"
+}
+
+echo_if_to() {
+    local COND=$1
+    local DEST=$2
+    local CONTENTS=$3
+
+    if [ $COND -ne 0 ]; then
+        echo_to "$DEST" "$CONTENTS"
+    fi
+}
+
+install_cabalplan() {
+    put_info "installing cabal-plan"
+
+    if [ ! -e $CABAL_REPOCACHE/downloads/cabal-plan ]; then
+        curl -L https://github.com/haskell-hvr/cabal-plan/releases/download/v0.6.2.0/cabal-plan-0.6.2.0-x86_64-linux.xz > /tmp/cabal-plan.xz || exit 1
+        (cd /tmp && echo "de73600b1836d3f55e32d80385acc055fd97f60eaa0ab68a755302685f5d81bc  cabal-plan.xz" | sha256sum -c -)|| exit 1
+        mkdir -p $CABAL_REPOCACHE/downloads
+        xz -d < /tmp/cabal-plan.xz > $CABAL_REPOCACHE/downloads/cabal-plan || exit 1
+        chmod a+x $CABAL_REPOCACHE/downloads/cabal-plan || exit 1
+    fi
+
+    mkdir -p $CABAL_DIR/bin || exit 1
+    ln -s $CABAL_REPOCACHE/downloads/cabal-plan $CABAL_DIR/bin/cabal-plan || exit 1
+}
+
+# Help
+##############################################################################
+
+show_usage() {
+cat <<EOF
+./haskell-ci.sh - build & test
+
+Usage: ./haskell-ci.sh [options]
+  A script to run automated checks locally (using Docker)
+
+Available options:
+  --jobs JOBS               Jobs to run (default: $CFG_JOBS)
+  --cabal-store-cache PATH  Directory to use for cabal-store-cache
+  --cabal-repo-cache PATH   Directory to use for cabal-repo-cache
+  --skip-cabal-update       Skip cabal update (useful with --cabal-repo-cache)
+  --no-skip-cabal-update
+  --help                    Print this message
+
+EOF
+}
+
+# getopt
+#######################################################################
+
+process_cli_options() {
+    while [ $# -gt 0 ]; do
+        arg=$1
+        case $arg in
+            --help)
+                show_usage
+                exit
+                ;;
+            --jobs)
+                CFG_JOBS=$2
+                shift
+                shift
+                ;;
+            --cabal-store-cache)
+                CFG_CABAL_STORE_CACHE=$2
+                shift
+                shift
+                ;;
+            --cabal-repo-cache)
+                CFG_CABAL_REPO_CACHE=$2
+                shift
+                shift
+                ;;
+            --skip-cabal-update)
+                CFG_CABAL_UPDATE=false
+                shift
+                ;;
+            --no-skip-cabal-update)
+                CFG_CABAL_UPDATE=true
+                shift
+                ;;
+            *)
+                echo "Unknown option $arg"
+                exit 1
+        esac
+    done
+}
+
+process_indocker_options () {
+    while [ $# -gt 0 ]; do
+        arg=$1
+
+        case $arg in
+            --ghc-version)
+                GHC_VERSION=$2
+                shift
+                shift
+                ;;
+            --cabal-version)
+                CABAL_VERSION=$2
+                shift
+                shift
+                ;;
+            --start-time)
+                START_TIME=$2
+                shift
+                shift
+                ;;
+            --cabal-update)
+                CABAL_UPDATE=$2
+                shift
+                shift
+                ;;
+            *)
+                echo "Unknown option $arg"
+                exit 1
+        esac
+    done
+}
+
+if $INDOCKER; then
+    process_indocker_options "$@"
+
+else
+    if [ -f "$XDG_CONFIG_HOME/haskell-ci/bash.config" ]; then
+        process_cli_options $(cat "$XDG_CONFIG_HOME/haskell-ci/bash.config")
+    fi
+
+    process_cli_options "$@"
+
+    put_info "jobs:              $CFG_JOBS"
+    put_info "cabal-store-cache: $CFG_CABAL_STORE_CACHE"
+    put_info "cabal-repo-cache:  $CFG_CABAL_REPO_CACHE"
+    put_info "cabal-update:      $CFG_CABAL_UPDATE"
+fi
+
+# Constants
+##############################################################################
+
+SRCDIR=/hsci/src
+BUILDDIR=/hsci/build
+CABAL_DIR="$BUILDDIR/cabal"
+CABAL_REPOCACHE=/hsci/cabal-repocache
+CABAL_STOREDIR=/hsci/store
+
+# Docker invoke
+##############################################################################
+
+# if cache directory is specified, use it.
+# Otherwise use another tmpfs host
+if [ -z "$CFG_CABAL_STORE_CACHE" ]; then
+    CABALSTOREARG="--tmpfs $CABAL_STOREDIR:exec"
+else
+    CABALSTOREARG="--volume $CFG_CABAL_STORE_CACHE:$CABAL_STOREDIR"
+fi
+
+if [ -z "$CFG_CABAL_REPO_CACHE" ]; then
+    CABALREPOARG="--tmpfs $CABAL_REPOCACHE:exec"
+else
+    CABALREPOARG="--volume $CFG_CABAL_REPO_CACHE:$CABAL_REPOCACHE"
+fi
+
+echo_docker_cmd() {
+    local GHCVER=$1
+
+    # TODO: mount /hsci/src:ro (readonly)
+    echo docker run \
+        --tty \
+        --interactive \
+        --rm \
+        --label haskell-ci \
+        --volume "$(pwd):/hsci/src" \
+        $CABALSTOREARG \
+        $CABALREPOARG \
+        --tmpfs /tmp:exec \
+        --tmpfs /hsci/build:exec \
+        --workdir /hsci/build \
+        "phadej/ghc:$GHCVER-bionic" \
+        "/bin/bash" "/hsci/src/$SCRIPT_NAME" indocker \
+        --ghc-version "$GHCVER" \
+        --cabal-update "$CFG_CABAL_UPDATE" \
+        --start-time "$START_TIME"
+}
+
+# if we are not in docker, loop through jobs
+if ! $INDOCKER; then
+    for JOB in $CFG_JOBS; do
+        put_info "Running in docker: $JOB"
+        run_cmd $(echo_docker_cmd "$JOB")
+    done
+
+    run_cmd echo "ALL OK"
+    exit 0
+fi
+
+# Otherwise we are in docker, and the rest of script executes
+put_info "In docker"
+
+# Environment
+##############################################################################
+
+GHCDIR=/opt/ghc/$GHC_VERSION
+
+HC=$GHCDIR/bin/ghc
+HCPKG=$GHCDIR/bin/ghc-pkg
+HADDOCK=$GHCDIR/bin/haddock
+
+CABAL=/opt/cabal/$CABAL_VERSION/bin/cabal
+
+CABAL="$CABAL -vnormal+nowrap"
+
+export CABAL_DIR
+export CABAL_CONFIG="$BUILDDIR/cabal/config"
+
+PATH="$CABAL_DIR/bin:$PATH"
+
+# HCNUMVER
+HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
+GHCJSARITH=0
+
+put_info "HCNUMVER: $HCNUMVER"
+
+# Args for shorter/nicer commands
+if [ $((GHCJSARITH || ! GHCJSARITH)) -ne 0 ] ; then ARG_TESTS=--enable-tests; else ARG_TESTS=--disable-tests; fi
+if [ $((GHCJSARITH || ! GHCJSARITH)) -ne 0 ] ; then ARG_BENCH=--enable-benchmarks; else ARG_BENCH=--disable-benchmarks; fi
+ARG_COMPILER="--ghc --with-compiler=$HC"
+
+put_info "tests/benchmarks: $ARG_TESTS $ARG_BENCH"
+
+# Apt dependencies
+##############################################################################
+
+
+# Cabal config
+##############################################################################
+
+mkdir -p $BUILDDIR/cabal
+
+cat > $BUILDDIR/cabal/config <<EOF
+remote-build-reporting: anonymous
+write-ghc-environment-files: always
+remote-repo-cache: $CABAL_REPOCACHE
+logs-dir:          $CABAL_DIR/logs
+world-file:        $CABAL_DIR/world
+extra-prog-path:   $CABAL_DIR/bin
+symlink-bindir:    $CABAL_DIR/bin
+installdir:        $CABAL_DIR/bin
+build-summary:     $CABAL_DIR/logs/build.log
+store-dir:         $CABAL_STOREDIR
+install-dirs user
+  prefix: $CABAL_DIR
+repository hackage.haskell.org
+  url: http://hackage.haskell.org/
+EOF
+
+if $HEADHACKAGE; then
+    put_error "head.hackage is not implemented"
+    exit 1
+fi
+
+run_cmd cat "$BUILDDIR/cabal/config"
+
+# Version
+##############################################################################
+
+put_info "Versions"
+run_cmd $HC --version
+run_cmd_unchecked $HC --print-project-git-commit-id
+run_cmd $CABAL --version
+
+# Build script
+##############################################################################
+
+# update cabal index
+if $CABAL_UPDATE; then
+    put_info "Updating Hackage index"
+    run_cmd $CABAL v2-update -v
+fi
+
+# install cabal-plan
+install_cabalplan
+run_cmd cabal-plan --version
+
+# initial cabal.project for sdist
+put_info "initial cabal.project for sdist"
+change_dir "$BUILDDIR"
+run_cmd touch cabal.project
+echo_to cabal.project "packages: $SRCDIR/splitmix"
+run_cmd cat cabal.project
+
+# sdist
+put_info "sdist"
+run_cmd mkdir -p "$BUILDDIR/sdist"
+run_cmd $CABAL sdist all --output-dir "$BUILDDIR/sdist"
+
+# unpack
+put_info "unpack"
+change_dir "$BUILDDIR"
+run_cmd mkdir -p "$BUILDDIR/unpacked"
+run_cmd find "$BUILDDIR/sdist" -maxdepth 1 -type f -name '*.tar.gz' -exec tar -C "$BUILDDIR/unpacked" -xzvf {} \;
+
+# generate cabal.project
+put_info "generate cabal.project"
+PKGDIR_splitmix="$(find "$BUILDDIR/unpacked" -maxdepth 1 -type d -regex '.*/splitmix-[0-9.]*')"
+run_cmd touch cabal.project
+run_cmd touch cabal.project.local
+echo_to cabal.project "packages: ${PKGDIR_splitmix}"
+echo_if_to $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) cabal.project "package splitmix"
+echo_if_to $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) cabal.project "    ghc-options: -Werror=missing-methods"
+cat >> cabal.project <<EOF
+EOF
+$HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(splitmix)$/; }' >> cabal.project.local
+run_cmd cat cabal.project
+run_cmd cat cabal.project.local
+
+# dump install plan
+put_info "dump install plan"
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
+run_cmd cabal-plan
+
+# install dependencies
+put_info "install dependencies"
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j all
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dependencies-only -j all
+
+# build w/o tests
+put_info "build w/o tests"
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+
+# build
+put_info "build"
+run_cmd $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all
+
+# tests
+put_info "tests"
+run_cmd_if $((! GHCJSARITH)) $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
+
+# cabal check
+put_info "cabal check"
+change_dir "${PKGDIR_splitmix}"
+run_cmd ${CABAL} -vnormal check
+change_dir "$BUILDDIR"
+
+# haddock
+put_info "haddock"
+run_cmd_if $((! GHCJSARITH)) $CABAL v2-haddock --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all
+
+# unconstrained build
+put_info "unconstrained build"
+run_cmd rm -f cabal.project.local
+run_cmd $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+
+
+# Done
+run_cmd echo OK
diff --git a/fixtures/matrix-extra.github b/fixtures/matrix-extra.github
new file mode 100644
index 00000000..642be520
--- /dev/null
+++ b/fixtures/matrix-extra.github
@@ -0,0 +1,1801 @@
+# SUCCESS
+# *INFO* Generating GitHub config for testing for GHC versions: 8.0.1 8.0.2 8.2.1 8.2.2 8.4.1 8.4.2 8.4.3 8.4.4 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.8.1 8.8.2 8.8.3 8.8.4 8.10.1 8.10.2 8.10.3 8.10.4 8.10.5 8.10.6 8.10.7 9.0.1 9.0.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.2.7 9.2.8 9.4.1 9.4.2 9.4.3 9.4.4 9.4.5 9.4.6 9.4.7 9.4.8 9.6.1 9.6.2 9.6.3 9.6.4 9.6.5 9.6.6 9.6.7 9.8.1 9.8.2 9.8.3 9.8.4 9.10.1 9.10.2 9.12.1 9.12.2 ghcjs-8.4
+# This GitHub workflow config has been generated by a script via
+#
+#   haskell-ci '--matrix-extra=abc:1,2' '--matrix-extra=foo:bar,baz' 'github' 'matrix-extra.project'
+#
+# To regenerate the script (for example after adjusting tested-with) run
+#
+#   haskell-ci regenerate
+#
+# For more information, see https://github.com/haskell-CI/haskell-ci
+#
+# REGENDATA ["--matrix-extra=abc:1,2","--matrix-extra=foo:bar,baz","github","matrix-extra.project"]
+#
+name: Haskell-CI
+on:
+  - push
+  - pull_request
+jobs:
+  linux:
+    name: Haskell-CI - Linux - ${{ matrix.compiler }}
+    runs-on: ubuntu-24.04
+    timeout-minutes:
+      60
+    container:
+      image: buildpack-deps:jammy
+    continue-on-error: ${{ matrix.allow-failure }}
+    strategy:
+      matrix:
+        include:
+          - compiler: ghc-9.12.2
+            compilerKind: ghc
+            compilerVersion: 9.12.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.12.1
+            compilerKind: ghc
+            compilerVersion: 9.12.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.10.2
+            compilerKind: ghc
+            compilerVersion: 9.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.10.1
+            compilerKind: ghc
+            compilerVersion: 9.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.8.4
+            compilerKind: ghc
+            compilerVersion: 9.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.8.3
+            compilerKind: ghc
+            compilerVersion: 9.8.3
+            setup-method: ghcup-vanilla
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.8.2
+            compilerKind: ghc
+            compilerVersion: 9.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.8.1
+            compilerKind: ghc
+            compilerVersion: 9.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.7
+            compilerKind: ghc
+            compilerVersion: 9.6.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.6
+            compilerKind: ghc
+            compilerVersion: 9.6.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.5
+            compilerKind: ghc
+            compilerVersion: 9.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.4
+            compilerKind: ghc
+            compilerVersion: 9.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.3
+            compilerKind: ghc
+            compilerVersion: 9.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.2
+            compilerKind: ghc
+            compilerVersion: 9.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.6.1
+            compilerKind: ghc
+            compilerVersion: 9.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.8
+            compilerKind: ghc
+            compilerVersion: 9.4.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.7
+            compilerKind: ghc
+            compilerVersion: 9.4.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.6
+            compilerKind: ghc
+            compilerVersion: 9.4.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.5
+            compilerKind: ghc
+            compilerVersion: 9.4.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.4
+            compilerKind: ghc
+            compilerVersion: 9.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.3
+            compilerKind: ghc
+            compilerVersion: 9.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.2
+            compilerKind: ghc
+            compilerVersion: 9.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.4.1
+            compilerKind: ghc
+            compilerVersion: 9.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.8
+            compilerKind: ghc
+            compilerVersion: 9.2.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.7
+            compilerKind: ghc
+            compilerVersion: 9.2.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.6
+            compilerKind: ghc
+            compilerVersion: 9.2.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.5
+            compilerKind: ghc
+            compilerVersion: 9.2.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.4
+            compilerKind: ghc
+            compilerVersion: 9.2.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.3
+            compilerKind: ghc
+            compilerVersion: 9.2.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.2
+            compilerKind: ghc
+            compilerVersion: 9.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.2.1
+            compilerKind: ghc
+            compilerVersion: 9.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.0.2
+            compilerKind: ghc
+            compilerVersion: 9.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.0.1
+            compilerKind: ghc
+            compilerVersion: 9.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.6
+            compilerKind: ghc
+            compilerVersion: 8.10.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.5
+            compilerKind: ghc
+            compilerVersion: 8.10.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.4
+            compilerKind: ghc
+            compilerVersion: 8.10.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.3
+            compilerKind: ghc
+            compilerVersion: 8.10.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.2
+            compilerKind: ghc
+            compilerVersion: 8.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.10.1
+            compilerKind: ghc
+            compilerVersion: 8.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.8.4
+            compilerKind: ghc
+            compilerVersion: 8.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.8.3
+            compilerKind: ghc
+            compilerVersion: 8.8.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.8.2
+            compilerKind: ghc
+            compilerVersion: 8.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.8.1
+            compilerKind: ghc
+            compilerVersion: 8.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.6.5
+            compilerKind: ghc
+            compilerVersion: 8.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.6.4
+            compilerKind: ghc
+            compilerVersion: 8.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.6.3
+            compilerKind: ghc
+            compilerVersion: 8.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.6.2
+            compilerKind: ghc
+            compilerVersion: 8.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.6.1
+            compilerKind: ghc
+            compilerVersion: 8.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.4.4
+            compilerKind: ghc
+            compilerVersion: 8.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.4.3
+            compilerKind: ghc
+            compilerVersion: 8.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.4.2
+            compilerKind: ghc
+            compilerVersion: 8.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.4.1
+            compilerKind: ghc
+            compilerVersion: 8.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.2.2
+            compilerKind: ghc
+            compilerVersion: 8.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.2.1
+            compilerKind: ghc
+            compilerVersion: 8.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.0.2
+            compilerKind: ghc
+            compilerVersion: 8.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-8.0.1
+            compilerKind: ghc
+            compilerVersion: 8.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: bar
+          - compiler: ghc-9.12.2
+            compilerKind: ghc
+            compilerVersion: 9.12.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.12.1
+            compilerKind: ghc
+            compilerVersion: 9.12.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.10.2
+            compilerKind: ghc
+            compilerVersion: 9.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.10.1
+            compilerKind: ghc
+            compilerVersion: 9.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.8.4
+            compilerKind: ghc
+            compilerVersion: 9.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.8.3
+            compilerKind: ghc
+            compilerVersion: 9.8.3
+            setup-method: ghcup-vanilla
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.8.2
+            compilerKind: ghc
+            compilerVersion: 9.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.8.1
+            compilerKind: ghc
+            compilerVersion: 9.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.7
+            compilerKind: ghc
+            compilerVersion: 9.6.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.6
+            compilerKind: ghc
+            compilerVersion: 9.6.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.5
+            compilerKind: ghc
+            compilerVersion: 9.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.4
+            compilerKind: ghc
+            compilerVersion: 9.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.3
+            compilerKind: ghc
+            compilerVersion: 9.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.2
+            compilerKind: ghc
+            compilerVersion: 9.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.6.1
+            compilerKind: ghc
+            compilerVersion: 9.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.8
+            compilerKind: ghc
+            compilerVersion: 9.4.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.7
+            compilerKind: ghc
+            compilerVersion: 9.4.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.6
+            compilerKind: ghc
+            compilerVersion: 9.4.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.5
+            compilerKind: ghc
+            compilerVersion: 9.4.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.4
+            compilerKind: ghc
+            compilerVersion: 9.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.3
+            compilerKind: ghc
+            compilerVersion: 9.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.2
+            compilerKind: ghc
+            compilerVersion: 9.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.4.1
+            compilerKind: ghc
+            compilerVersion: 9.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.8
+            compilerKind: ghc
+            compilerVersion: 9.2.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.7
+            compilerKind: ghc
+            compilerVersion: 9.2.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.6
+            compilerKind: ghc
+            compilerVersion: 9.2.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.5
+            compilerKind: ghc
+            compilerVersion: 9.2.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.4
+            compilerKind: ghc
+            compilerVersion: 9.2.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.3
+            compilerKind: ghc
+            compilerVersion: 9.2.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.2
+            compilerKind: ghc
+            compilerVersion: 9.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.2.1
+            compilerKind: ghc
+            compilerVersion: 9.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.0.2
+            compilerKind: ghc
+            compilerVersion: 9.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.0.1
+            compilerKind: ghc
+            compilerVersion: 9.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.6
+            compilerKind: ghc
+            compilerVersion: 8.10.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.5
+            compilerKind: ghc
+            compilerVersion: 8.10.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.4
+            compilerKind: ghc
+            compilerVersion: 8.10.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.3
+            compilerKind: ghc
+            compilerVersion: 8.10.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.2
+            compilerKind: ghc
+            compilerVersion: 8.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.10.1
+            compilerKind: ghc
+            compilerVersion: 8.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.8.4
+            compilerKind: ghc
+            compilerVersion: 8.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.8.3
+            compilerKind: ghc
+            compilerVersion: 8.8.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.8.2
+            compilerKind: ghc
+            compilerVersion: 8.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.8.1
+            compilerKind: ghc
+            compilerVersion: 8.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.6.5
+            compilerKind: ghc
+            compilerVersion: 8.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.6.4
+            compilerKind: ghc
+            compilerVersion: 8.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.6.3
+            compilerKind: ghc
+            compilerVersion: 8.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.6.2
+            compilerKind: ghc
+            compilerVersion: 8.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.6.1
+            compilerKind: ghc
+            compilerVersion: 8.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.4.4
+            compilerKind: ghc
+            compilerVersion: 8.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.4.3
+            compilerKind: ghc
+            compilerVersion: 8.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.4.2
+            compilerKind: ghc
+            compilerVersion: 8.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.4.1
+            compilerKind: ghc
+            compilerVersion: 8.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.2.2
+            compilerKind: ghc
+            compilerVersion: 8.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.2.1
+            compilerKind: ghc
+            compilerVersion: 8.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.0.2
+            compilerKind: ghc
+            compilerVersion: 8.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-8.0.1
+            compilerKind: ghc
+            compilerVersion: 8.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "1"
+            foo: baz
+          - compiler: ghc-9.12.2
+            compilerKind: ghc
+            compilerVersion: 9.12.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.12.1
+            compilerKind: ghc
+            compilerVersion: 9.12.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.10.2
+            compilerKind: ghc
+            compilerVersion: 9.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.10.1
+            compilerKind: ghc
+            compilerVersion: 9.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.8.4
+            compilerKind: ghc
+            compilerVersion: 9.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.8.3
+            compilerKind: ghc
+            compilerVersion: 9.8.3
+            setup-method: ghcup-vanilla
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.8.2
+            compilerKind: ghc
+            compilerVersion: 9.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.8.1
+            compilerKind: ghc
+            compilerVersion: 9.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.7
+            compilerKind: ghc
+            compilerVersion: 9.6.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.6
+            compilerKind: ghc
+            compilerVersion: 9.6.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.5
+            compilerKind: ghc
+            compilerVersion: 9.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.4
+            compilerKind: ghc
+            compilerVersion: 9.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.3
+            compilerKind: ghc
+            compilerVersion: 9.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.2
+            compilerKind: ghc
+            compilerVersion: 9.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.6.1
+            compilerKind: ghc
+            compilerVersion: 9.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.8
+            compilerKind: ghc
+            compilerVersion: 9.4.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.7
+            compilerKind: ghc
+            compilerVersion: 9.4.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.6
+            compilerKind: ghc
+            compilerVersion: 9.4.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.5
+            compilerKind: ghc
+            compilerVersion: 9.4.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.4
+            compilerKind: ghc
+            compilerVersion: 9.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.3
+            compilerKind: ghc
+            compilerVersion: 9.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.2
+            compilerKind: ghc
+            compilerVersion: 9.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.4.1
+            compilerKind: ghc
+            compilerVersion: 9.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.8
+            compilerKind: ghc
+            compilerVersion: 9.2.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.7
+            compilerKind: ghc
+            compilerVersion: 9.2.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.6
+            compilerKind: ghc
+            compilerVersion: 9.2.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.5
+            compilerKind: ghc
+            compilerVersion: 9.2.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.4
+            compilerKind: ghc
+            compilerVersion: 9.2.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.3
+            compilerKind: ghc
+            compilerVersion: 9.2.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.2
+            compilerKind: ghc
+            compilerVersion: 9.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.2.1
+            compilerKind: ghc
+            compilerVersion: 9.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.0.2
+            compilerKind: ghc
+            compilerVersion: 9.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.0.1
+            compilerKind: ghc
+            compilerVersion: 9.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.6
+            compilerKind: ghc
+            compilerVersion: 8.10.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.5
+            compilerKind: ghc
+            compilerVersion: 8.10.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.4
+            compilerKind: ghc
+            compilerVersion: 8.10.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.3
+            compilerKind: ghc
+            compilerVersion: 8.10.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.2
+            compilerKind: ghc
+            compilerVersion: 8.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.10.1
+            compilerKind: ghc
+            compilerVersion: 8.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.8.4
+            compilerKind: ghc
+            compilerVersion: 8.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.8.3
+            compilerKind: ghc
+            compilerVersion: 8.8.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.8.2
+            compilerKind: ghc
+            compilerVersion: 8.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.8.1
+            compilerKind: ghc
+            compilerVersion: 8.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.6.5
+            compilerKind: ghc
+            compilerVersion: 8.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.6.4
+            compilerKind: ghc
+            compilerVersion: 8.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.6.3
+            compilerKind: ghc
+            compilerVersion: 8.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.6.2
+            compilerKind: ghc
+            compilerVersion: 8.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.6.1
+            compilerKind: ghc
+            compilerVersion: 8.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.4.4
+            compilerKind: ghc
+            compilerVersion: 8.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.4.3
+            compilerKind: ghc
+            compilerVersion: 8.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.4.2
+            compilerKind: ghc
+            compilerVersion: 8.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.4.1
+            compilerKind: ghc
+            compilerVersion: 8.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.2.2
+            compilerKind: ghc
+            compilerVersion: 8.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.2.1
+            compilerKind: ghc
+            compilerVersion: 8.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.0.2
+            compilerKind: ghc
+            compilerVersion: 8.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-8.0.1
+            compilerKind: ghc
+            compilerVersion: 8.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: bar
+          - compiler: ghc-9.12.2
+            compilerKind: ghc
+            compilerVersion: 9.12.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.12.1
+            compilerKind: ghc
+            compilerVersion: 9.12.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.10.2
+            compilerKind: ghc
+            compilerVersion: 9.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.10.1
+            compilerKind: ghc
+            compilerVersion: 9.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.8.4
+            compilerKind: ghc
+            compilerVersion: 9.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.8.3
+            compilerKind: ghc
+            compilerVersion: 9.8.3
+            setup-method: ghcup-vanilla
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.8.2
+            compilerKind: ghc
+            compilerVersion: 9.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.8.1
+            compilerKind: ghc
+            compilerVersion: 9.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.7
+            compilerKind: ghc
+            compilerVersion: 9.6.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.6
+            compilerKind: ghc
+            compilerVersion: 9.6.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.5
+            compilerKind: ghc
+            compilerVersion: 9.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.4
+            compilerKind: ghc
+            compilerVersion: 9.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.3
+            compilerKind: ghc
+            compilerVersion: 9.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.2
+            compilerKind: ghc
+            compilerVersion: 9.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.6.1
+            compilerKind: ghc
+            compilerVersion: 9.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.8
+            compilerKind: ghc
+            compilerVersion: 9.4.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.7
+            compilerKind: ghc
+            compilerVersion: 9.4.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.6
+            compilerKind: ghc
+            compilerVersion: 9.4.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.5
+            compilerKind: ghc
+            compilerVersion: 9.4.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.4
+            compilerKind: ghc
+            compilerVersion: 9.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.3
+            compilerKind: ghc
+            compilerVersion: 9.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.2
+            compilerKind: ghc
+            compilerVersion: 9.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.4.1
+            compilerKind: ghc
+            compilerVersion: 9.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.8
+            compilerKind: ghc
+            compilerVersion: 9.2.8
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.7
+            compilerKind: ghc
+            compilerVersion: 9.2.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.6
+            compilerKind: ghc
+            compilerVersion: 9.2.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.5
+            compilerKind: ghc
+            compilerVersion: 9.2.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.4
+            compilerKind: ghc
+            compilerVersion: 9.2.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.3
+            compilerKind: ghc
+            compilerVersion: 9.2.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.2
+            compilerKind: ghc
+            compilerVersion: 9.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.2.1
+            compilerKind: ghc
+            compilerVersion: 9.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.0.2
+            compilerKind: ghc
+            compilerVersion: 9.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-9.0.1
+            compilerKind: ghc
+            compilerVersion: 9.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.6
+            compilerKind: ghc
+            compilerVersion: 8.10.6
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.5
+            compilerKind: ghc
+            compilerVersion: 8.10.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.4
+            compilerKind: ghc
+            compilerVersion: 8.10.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.3
+            compilerKind: ghc
+            compilerVersion: 8.10.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.2
+            compilerKind: ghc
+            compilerVersion: 8.10.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.10.1
+            compilerKind: ghc
+            compilerVersion: 8.10.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.8.4
+            compilerKind: ghc
+            compilerVersion: 8.8.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.8.3
+            compilerKind: ghc
+            compilerVersion: 8.8.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.8.2
+            compilerKind: ghc
+            compilerVersion: 8.8.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.8.1
+            compilerKind: ghc
+            compilerVersion: 8.8.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.6.5
+            compilerKind: ghc
+            compilerVersion: 8.6.5
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.6.4
+            compilerKind: ghc
+            compilerVersion: 8.6.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.6.3
+            compilerKind: ghc
+            compilerVersion: 8.6.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.6.2
+            compilerKind: ghc
+            compilerVersion: 8.6.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.6.1
+            compilerKind: ghc
+            compilerVersion: 8.6.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.4.4
+            compilerKind: ghc
+            compilerVersion: 8.4.4
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.4.3
+            compilerKind: ghc
+            compilerVersion: 8.4.3
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.4.2
+            compilerKind: ghc
+            compilerVersion: 8.4.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.4.1
+            compilerKind: ghc
+            compilerVersion: 8.4.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.2.2
+            compilerKind: ghc
+            compilerVersion: 8.2.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.2.1
+            compilerKind: ghc
+            compilerVersion: 8.2.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.0.2
+            compilerKind: ghc
+            compilerVersion: 8.0.2
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+          - compiler: ghc-8.0.1
+            compilerKind: ghc
+            compilerVersion: 8.0.1
+            setup-method: ghcup
+            allow-failure: false
+            abc: "2"
+            foo: baz
+      fail-fast: false
+    steps:
+      - name: apt-get install
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends gnupg ca-certificates dirmngr curl git software-properties-common libtinfo5 libnuma-dev
+      - name: Install GHCup
+        run: |
+          mkdir -p "$HOME/.ghcup/bin"
+          curl -sL https://downloads.haskell.org/ghcup/0.1.50.1/x86_64-linux-ghcup-0.1.50.1 > "$HOME/.ghcup/bin/ghcup"
+          chmod a+x "$HOME/.ghcup/bin/ghcup"
+      - name: Install cabal-install
+        run: |
+          "$HOME/.ghcup/bin/ghcup" install cabal 3.14.2.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+          echo "CABAL=$HOME/.ghcup/bin/cabal-3.14.2.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+      - name: Install GHC (GHCup)
+        if: matrix.setup-method == 'ghcup'
+        run: |
+          "$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
+          HC=$("$HOME/.ghcup/bin/ghcup" whereis ghc "$HCVER")
+          HCPKG=$(echo "$HC" | sed 's#ghc$#ghc-pkg#')
+          HADDOCK=$(echo "$HC" | sed 's#ghc$#haddock#')
+          echo "HC=$HC" >> "$GITHUB_ENV"
+          echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
+          echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
+        env:
+          HCKIND: ${{ matrix.compilerKind }}
+          HCNAME: ${{ matrix.compiler }}
+          HCVER: ${{ matrix.compilerVersion }}
+      - name: Install GHC (GHCup vanilla)
+        if: matrix.setup-method == 'ghcup-vanilla'
+        run: |
+          "$HOME/.ghcup/bin/ghcup" -s https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-vanilla-0.0.8.yaml install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
+          HC=$("$HOME/.ghcup/bin/ghcup" whereis ghc "$HCVER")
+          HCPKG=$(echo "$HC" | sed 's#ghc$#ghc-pkg#')
+          HADDOCK=$(echo "$HC" | sed 's#ghc$#haddock#')
+          echo "HC=$HC" >> "$GITHUB_ENV"
+          echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
+          echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
+        env:
+          HCKIND: ${{ matrix.compilerKind }}
+          HCNAME: ${{ matrix.compiler }}
+          HCVER: ${{ matrix.compilerVersion }}
+      - name: Set PATH and environment variables
+        run: |
+          echo "$HOME/.cabal/bin" >> $GITHUB_PATH
+          echo "LANG=C.UTF-8" >> "$GITHUB_ENV"
+          echo "CABAL_DIR=$HOME/.cabal" >> "$GITHUB_ENV"
+          echo "CABAL_CONFIG=$HOME/.cabal/config" >> "$GITHUB_ENV"
+          HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
+          echo "HCNUMVER=$HCNUMVER" >> "$GITHUB_ENV"
+          echo "ARG_TESTS=--enable-tests" >> "$GITHUB_ENV"
+          echo "ARG_BENCH=--enable-benchmarks" >> "$GITHUB_ENV"
+          echo "HEADHACKAGE=false" >> "$GITHUB_ENV"
+          echo "ARG_COMPILER=--$HCKIND --with-compiler=$HC" >> "$GITHUB_ENV"
+        env:
+          HCKIND: ${{ matrix.compilerKind }}
+          HCNAME: ${{ matrix.compiler }}
+          HCVER: ${{ matrix.compilerVersion }}
+      - name: env
+        run: |
+          env
+      - name: write cabal config
+        run: |
+          mkdir -p $CABAL_DIR
+          cat >> $CABAL_CONFIG <<EOF
+          remote-build-reporting: anonymous
+          write-ghc-environment-files: never
+          remote-repo-cache: $CABAL_DIR/packages
+          logs-dir:          $CABAL_DIR/logs
+          world-file:        $CABAL_DIR/world
+          extra-prog-path:   $CABAL_DIR/bin
+          symlink-bindir:    $CABAL_DIR/bin
+          installdir:        $CABAL_DIR/bin
+          build-summary:     $CABAL_DIR/logs/build.log
+          store-dir:         $CABAL_DIR/store
+          install-dirs user
+            prefix: $CABAL_DIR
+          repository hackage.haskell.org
+            url: http://hackage.haskell.org/
+          EOF
+          cat >> $CABAL_CONFIG <<EOF
+          program-default-options
+            ghc-options: $GHCJOBS +RTS -M3G -RTS
+          EOF
+          cat $CABAL_CONFIG
+      - name: versions
+        run: |
+          $HC --version || true
+          $HC --print-project-git-commit-id || true
+          $CABAL --version || true
+      - name: update cabal index
+        run: |
+          $CABAL v2-update -v
+      - name: install cabal-plan
+        run: |
+          mkdir -p $HOME/.cabal/bin
+          curl -sL https://github.com/haskell-hvr/cabal-plan/releases/download/v0.7.3.0/cabal-plan-0.7.3.0-x86_64-linux.xz > cabal-plan.xz
+          echo 'f62ccb2971567a5f638f2005ad3173dba14693a45154c1508645c52289714cb2  cabal-plan.xz' | sha256sum -c -
+          xz -d < cabal-plan.xz > $HOME/.cabal/bin/cabal-plan
+          rm -f cabal-plan.xz
+          chmod a+x $HOME/.cabal/bin/cabal-plan
+          cabal-plan --version
+      - name: checkout
+        uses: actions/checkout@v4
+        with:
+          path: source
+      - name: initial cabal.project for sdist
+        run: |
+          touch cabal.project
+          echo "packages: $GITHUB_WORKSPACE/source/splitmix" >> cabal.project
+          cat cabal.project
+      - name: sdist
+        run: |
+          mkdir -p sdist
+          $CABAL sdist all --output-dir $GITHUB_WORKSPACE/sdist
+      - name: unpack
+        run: |
+          mkdir -p unpacked
+          find sdist -maxdepth 1 -type f -name '*.tar.gz' -exec tar -C $GITHUB_WORKSPACE/unpacked -xzvf {} \;
+      - name: generate cabal.project
+        run: |
+          PKGDIR_splitmix="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/splitmix-[0-9.]*')"
+          echo "PKGDIR_splitmix=${PKGDIR_splitmix}" >> "$GITHUB_ENV"
+          rm -f cabal.project cabal.project.local
+          touch cabal.project
+          touch cabal.project.local
+          echo "packages: ${PKGDIR_splitmix}" >> cabal.project
+          if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo "package splitmix" >> cabal.project ; fi
+          if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
+          cat >> cabal.project <<EOF
+          EOF
+          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(splitmix)$/; }' >> cabal.project.local
+          cat cabal.project
+          cat cabal.project.local
+      - name: dump install plan
+        run: |
+          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
+          cabal-plan
+      - name: restore cache
+        uses: actions/cache/restore@v4
+        with:
+          key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
+          path: ~/.cabal/store
+          restore-keys: ${{ runner.os }}-${{ matrix.compiler }}-
+      - name: install dependencies
+        run: |
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j2 all
+          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dependencies-only -j2 all
+      - name: build w/o tests
+        run: |
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+      - name: build
+        run: |
+          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --write-ghc-environment-files=always
+      - name: tests
+        run: |
+          if [ $((! GHCJSARITH)) -ne 0 ] ; then $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct ; fi
+      - name: cabal check
+        run: |
+          cd ${PKGDIR_splitmix} || false
+          ${CABAL} -vnormal check
+      - name: haddock
+        run: |
+          if [ $((! GHCJSARITH)) -ne 0 ] ; then $CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all ; fi
+      - name: unconstrained build
+        run: |
+          rm -f cabal.project.local
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+      - name: save cache
+        if: always()
+        uses: actions/cache/save@v4
+        with:
+          key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
+          path: ~/.cabal/store
diff --git a/fixtures/matrix-extra.project b/fixtures/matrix-extra.project
new file mode 100644
index 00000000..b1f6a74e
--- /dev/null
+++ b/fixtures/matrix-extra.project
@@ -0,0 +1 @@
+packages: splitmix
diff --git a/fixtures/matrix-extra.travis b/fixtures/matrix-extra.travis
new file mode 100644
index 00000000..3dcde097
--- /dev/null
+++ b/fixtures/matrix-extra.travis
@@ -0,0 +1,298 @@
+# SUCCESS
+# *INFO* Generating Travis-CI config for testing for GHC versions: 7.0.1 7.0.2 7.0.3 7.0.4 7.2.1 7.2.2 7.4.1 7.4.2 7.6.1 7.6.2 7.6.3 7.8.1 7.8.2 7.8.3 7.8.4 7.10.1 7.10.2 7.10.3 8.0.1 8.0.2 8.2.1 8.2.2 8.4.1 8.4.2 8.4.3 8.4.4 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.8.1 8.8.2 8.8.3 8.8.4 8.10.1 8.10.2 8.10.3 8.10.4 8.10.5 8.10.6 8.10.7 9.0.1 9.0.2 9.2.1 9.2.2 9.2.3 9.2.4 9.4.1 9.4.2 ghcjs-8.4
+# This Travis job script has been generated by a script via
+#
+#   haskell-ci '--matrix-extra=abc:1,2' '--matrix-extra=foo:bar,baz' 'travis' 'matrix-extra.project'
+#
+# To regenerate the script (for example after adjusting tested-with) run
+#
+#   haskell-ci regenerate
+#
+# For more information, see https://github.com/haskell-CI/haskell-ci
+#
+version: ~> 1.0
+language: c
+os: linux
+dist: bionic
+git:
+  # whether to recursively clone submodules
+  submodules: false
+cache:
+  directories:
+    - $HOME/.cabal/packages
+    - $HOME/.cabal/store
+    - $HOME/.hlint
+before_cache:
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/build-reports.log
+  # remove files that are regenerated by 'cabal update'
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/00-index.*
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/*.json
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.cache
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar
+  - rm -fv $CABALHOME/packages/hackage.haskell.org/01-index.tar.idx
+  - rm -rfv $CABALHOME/packages/head.hackage
+jobs:
+  include:
+    - compiler: ghcjs-8.4
+      addons: {"apt":{"packages":["ghcjs-8.4","cabal-install-3.4","ghc-8.4.4","nodejs"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"},{"sourceline":"deb http://ppa.launchpad.net/hvr/ghcjs/ubuntu bionic main"},{"key_url":"https://deb.nodesource.com/gpgkey/nodesource.gpg.key","sourceline":"deb https://deb.nodesource.com/node_10.x bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.4.2
+      addons: {"apt":{"packages":["ghc-9.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.4.1
+      addons: {"apt":{"packages":["ghc-9.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.4
+      addons: {"apt":{"packages":["ghc-9.2.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.3
+      addons: {"apt":{"packages":["ghc-9.2.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.2
+      addons: {"apt":{"packages":["ghc-9.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.2.1
+      addons: {"apt":{"packages":["ghc-9.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.0.2
+      addons: {"apt":{"packages":["ghc-9.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-9.0.1
+      addons: {"apt":{"packages":["ghc-9.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.7
+      addons: {"apt":{"packages":["ghc-8.10.7","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.6
+      addons: {"apt":{"packages":["ghc-8.10.6","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.5
+      addons: {"apt":{"packages":["ghc-8.10.5","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.4
+      addons: {"apt":{"packages":["ghc-8.10.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.3
+      addons: {"apt":{"packages":["ghc-8.10.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.2
+      addons: {"apt":{"packages":["ghc-8.10.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.10.1
+      addons: {"apt":{"packages":["ghc-8.10.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.4
+      addons: {"apt":{"packages":["ghc-8.8.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.3
+      addons: {"apt":{"packages":["ghc-8.8.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.2
+      addons: {"apt":{"packages":["ghc-8.8.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.8.1
+      addons: {"apt":{"packages":["ghc-8.8.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.5
+      addons: {"apt":{"packages":["ghc-8.6.5","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.4
+      addons: {"apt":{"packages":["ghc-8.6.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.3
+      addons: {"apt":{"packages":["ghc-8.6.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.2
+      addons: {"apt":{"packages":["ghc-8.6.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.6.1
+      addons: {"apt":{"packages":["ghc-8.6.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.4
+      addons: {"apt":{"packages":["ghc-8.4.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.3
+      addons: {"apt":{"packages":["ghc-8.4.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.2
+      addons: {"apt":{"packages":["ghc-8.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.4.1
+      addons: {"apt":{"packages":["ghc-8.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.2.2
+      addons: {"apt":{"packages":["ghc-8.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.2.1
+      addons: {"apt":{"packages":["ghc-8.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.0.2
+      addons: {"apt":{"packages":["ghc-8.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-8.0.1
+      addons: {"apt":{"packages":["ghc-8.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.3
+      addons: {"apt":{"packages":["ghc-7.10.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.2
+      addons: {"apt":{"packages":["ghc-7.10.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.10.1
+      addons: {"apt":{"packages":["ghc-7.10.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.4
+      addons: {"apt":{"packages":["ghc-7.8.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.3
+      addons: {"apt":{"packages":["ghc-7.8.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.2
+      addons: {"apt":{"packages":["ghc-7.8.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.8.1
+      addons: {"apt":{"packages":["ghc-7.8.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.3
+      addons: {"apt":{"packages":["ghc-7.6.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.2
+      addons: {"apt":{"packages":["ghc-7.6.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.6.1
+      addons: {"apt":{"packages":["ghc-7.6.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.4.2
+      addons: {"apt":{"packages":["ghc-7.4.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.4.1
+      addons: {"apt":{"packages":["ghc-7.4.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.2.2
+      addons: {"apt":{"packages":["ghc-7.2.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.2.1
+      addons: {"apt":{"packages":["ghc-7.2.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.4
+      addons: {"apt":{"packages":["ghc-7.0.4","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.3
+      addons: {"apt":{"packages":["ghc-7.0.3","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.2
+      addons: {"apt":{"packages":["ghc-7.0.2","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+    - compiler: ghc-7.0.1
+      addons: {"apt":{"packages":["ghc-7.0.1","cabal-install-3.6"],"sources":[{"key_url":"https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x063dab2bdc0b3f9fcebc378bff3aeacef6f88286","sourceline":"deb http://ppa.launchpad.net/hvr/ghc/ubuntu bionic main"}]}}
+      os: linux
+before_install:
+  - |
+    if echo $CC | grep -q ghcjs; then
+        GHCJS=true; GHCJSARITH=1;
+    else
+        GHCJS=false; GHCJSARITH=0;
+    fi
+  - HC=$(echo "/opt/$CC/bin/ghc" | sed 's/-/\//')
+  - WITHCOMPILER="-w $HC"
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then HC=${HC}js ; fi
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then WITHCOMPILER="--ghcjs ${WITHCOMPILER}js" ; fi
+  - HADDOCK=$(echo "/opt/$CC/bin/haddock" | sed 's/-/\//')
+  - if [ $((GHCJSARITH)) -ne 0 ] ; then PATH="/opt/ghc/8.4.4/bin:$PATH" ; fi
+  - HCPKG="$HC-pkg"
+  - unset CC
+  - CABAL=/opt/ghc/bin/cabal
+  - CABALHOME=$HOME/.cabal
+  - export PATH="$CABALHOME/bin:$PATH"
+  - TOP=$(pwd)
+  - "HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')"
+  - echo $HCNUMVER
+  - CABAL="$CABAL -vnormal+nowrap"
+  - set -o pipefail
+  - TEST=--enable-tests
+  - BENCH=--enable-benchmarks
+  - HEADHACKAGE=false
+  - rm -f $CABALHOME/config
+  - |
+    echo "verbose: normal +nowrap +markoutput"          >> $CABALHOME/config
+    echo "remote-build-reporting: anonymous"            >> $CABALHOME/config
+    echo "write-ghc-environment-files: never"           >> $CABALHOME/config
+    echo "remote-repo-cache: $CABALHOME/packages"       >> $CABALHOME/config
+    echo "logs-dir:          $CABALHOME/logs"           >> $CABALHOME/config
+    echo "world-file:        $CABALHOME/world"          >> $CABALHOME/config
+    echo "extra-prog-path:   $CABALHOME/bin"            >> $CABALHOME/config
+    echo "symlink-bindir:    $CABALHOME/bin"            >> $CABALHOME/config
+    echo "installdir:        $CABALHOME/bin"            >> $CABALHOME/config
+    echo "build-summary:     $CABALHOME/logs/build.log" >> $CABALHOME/config
+    echo "store-dir:         $CABALHOME/store"          >> $CABALHOME/config
+    echo "install-dirs user"                            >> $CABALHOME/config
+    echo "  prefix: $CABALHOME"                         >> $CABALHOME/config
+    echo "repository hackage.haskell.org"               >> $CABALHOME/config
+    echo "  url: http://hackage.haskell.org/"           >> $CABALHOME/config
+install:
+  - ${CABAL} --version
+  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - node --version
+  - echo $GHCJS
+  - |
+    echo "program-default-options"                >> $CABALHOME/config
+    echo "  ghc-options: $GHCJOBS +RTS -M6G -RTS" >> $CABALHOME/config
+  - cat $CABALHOME/config
+  - rm -fv cabal.project cabal.project.local cabal.project.freeze
+  - travis_retry ${CABAL} v2-update -v
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: splitmix" >> cabal.project
+  - if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo 'package splitmix' >> cabal.project ; fi
+  - "if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo '  ghc-options: -Werror=missing-methods' >> cabal.project ; fi"
+  - ""
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(splitmix)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  - if [ -f "splitmix/configure.ac" ]; then (cd "splitmix" && autoreconf -i); fi
+  - ${CABAL} v2-freeze $WITHCOMPILER ${TEST} ${BENCH}
+  - "cat cabal.project.freeze | sed -E 's/^(constraints: *| *)//' | sed 's/any.//'"
+  - rm  cabal.project.freeze
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} --dep -j2 all
+  - travis_wait 40 ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks --dep -j2 all
+script:
+  - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
+  # Packaging...
+  - ${CABAL} v2-sdist all
+  # Unpacking...
+  - mv dist-newstyle/sdist/*.tar.gz ${DISTDIR}/
+  - cd ${DISTDIR} || false
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar -xvf '{}' \;
+  - find . -maxdepth 1 -type f -name '*.tar.gz' -exec rm       '{}' \;
+  - PKGDIR_splitmix="$(find . -maxdepth 1 -type d -regex '.*/splitmix-[0-9.]*')"
+  # Generate cabal.project
+  - rm -rf cabal.project cabal.project.local cabal.project.freeze
+  - touch cabal.project
+  - |
+    echo "packages: ${PKGDIR_splitmix}" >> cabal.project
+  - if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo 'package splitmix' >> cabal.project ; fi
+  - "if [ $((GHCJSARITH || ! GHCJSARITH && HCNUMVER >= 80200)) -ne 0 ] ; then echo '  ghc-options: -Werror=missing-methods' >> cabal.project ; fi"
+  - ""
+  - "for pkg in $($HCPKG list --simple-output); do echo $pkg | sed 's/-[^-]*$//' | (grep -vE -- '^(splitmix)$' || true) | sed 's/^/constraints: /' | sed 's/$/ installed/' >> cabal.project.local; done"
+  - cat cabal.project || true
+  - cat cabal.project.local || true
+  # Building...
+  # this builds all libraries and executables (without tests/benchmarks)
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
+  # Building with tests and benchmarks...
+  # build & run tests, build benchmarks
+  - ${CABAL} v2-build $WITHCOMPILER ${TEST} ${BENCH} all --write-ghc-environment-files=always
+  # Testing...
+  - if [ $((! GHCJSARITH)) -ne 0 ] ; then ${CABAL} v2-test $WITHCOMPILER ${TEST} ${BENCH} all --test-show-details=direct ; fi
+  # cabal check...
+  - (cd ${PKGDIR_splitmix} && ${CABAL} -vnormal check)
+  # haddock...
+  - if [ $((! GHCJSARITH)) -ne 0 ] ; then ${CABAL} v2-haddock --haddock-all $WITHCOMPILER --with-haddock $HADDOCK ${TEST} ${BENCH} all ; fi
+  # Building without installed constraints for packages in global-db...
+  - rm -f cabal.project.local
+  - ${CABAL} v2-build $WITHCOMPILER --disable-tests --disable-benchmarks all
+
+# REGENDATA ["--matrix-extra=abc:1,2","--matrix-extra=foo:bar,baz","travis","matrix-extra.project"]
+# EOF
diff --git a/src/HaskellCI/Config/Grammar.hs b/src/HaskellCI/Config/Grammar.hs
index 785917bb..d447c481 100644
--- a/src/HaskellCI/Config/Grammar.hs
+++ b/src/HaskellCI/Config/Grammar.hs
@@ -9,6 +9,7 @@ module HaskellCI.Config.Grammar where
 import HaskellCI.Prelude
 
 import qualified Data.Map                        as M
+import qualified Data.Set                        as S
 import qualified Distribution.Compat.CharParsing as C
 import qualified Distribution.Compat.Newtype     as C
 import qualified Distribution.FieldGrammar       as C
@@ -53,6 +54,7 @@ configGrammar
        , c CopyFields
        , c CopyFields
        , c Env
+       , c MatrixExtra
        , c HeadVersion
        , c Jobs
        , c Natural
@@ -140,6 +142,8 @@ configGrammar = Config
         ^^^ help "Add google-chrome service"
     <*> monoidalFieldAla    "env"                       Env                                 (field @"cfgEnv")
         ^^^ metahelp "ENV" "Environment variables per job (e.g. `8.0.2:HADDOCK=false`)"
+    <*> monoidalFieldAla    "matrix-extra"              MatrixExtra                         (field @"cfgMatrixExtra")
+        ^^^ metahelp "MATRIX" "Extra matrix dimensions (e.g. `libfoo:2.6,3.0,git`)"
     <*> optionalFieldDefAla "allow-failures"            Range                               (field @"cfgAllowFailures") defaultConfig
         ^^^ metahelp "JOB" "Allow failures of particular GHC version"
     <*> booleanFieldDef     "last-in-series"                                                (field @"cfgLastInSeries") defaultConfig
@@ -194,3 +198,23 @@ instance C.Parsec Env where
 instance C.Pretty Env where
     pretty (Env m) = PP.fsep . PP.punctuate PP.comma . map p . M.toList $ m where
         p (v, s) = C.pretty v PP.<> PP.colon PP.<> PP.text s
+
+-------------------------------------------------------------------------------
+-- MatrixExtra
+-------------------------------------------------------------------------------
+
+newtype MatrixExtra = MatrixExtra (M.Map String (S.Set String))
+  deriving anyclass (C.Newtype (M.Map String (S.Set String)))
+
+instance C.Parsec MatrixExtra where
+  parsec = MatrixExtra . M.fromList . toList <$> C.sepByNonEmpty p (C.char ';')
+    where
+    p = do
+      k <- C.munch1 (/= ':')
+      _ <- C.char ':'
+      v <- foldMap S.singleton <$> C.sepByNonEmpty (C.munch1 (`notElem` [',', ';'])) (C.char ',')
+      pure (k, v)
+
+instance C.Pretty MatrixExtra where
+  pretty (MatrixExtra m) = PP.fsep . PP.punctuate PP.semi . map p . M.toList $ m where
+    p (k, v) = PP.text k PP.<> PP.colon PP.<> PP.fsep (PP.punctuate PP.comma (map PP.text (toList v)))
diff --git a/src/HaskellCI/Config/Initial.hs b/src/HaskellCI/Config/Initial.hs
index 74c36e22..61e0e396 100644
--- a/src/HaskellCI/Config/Initial.hs
+++ b/src/HaskellCI/Config/Initial.hs
@@ -57,6 +57,7 @@ initialConfig = Config
     , cfgPostgres            = False
     , cfgGoogleChrome        = False
     , cfgEnv                 = mempty
+    , cfgMatrixExtra         = mempty
     , cfgAllowFailures       = noVersion
     , cfgLastInSeries        = False
     , cfgLinuxJobs           = anyVersion
diff --git a/src/HaskellCI/Config/Type.hs b/src/HaskellCI/Config/Type.hs
index e16f8c5a..268ffad6 100644
--- a/src/HaskellCI/Config/Type.hs
+++ b/src/HaskellCI/Config/Type.hs
@@ -62,6 +62,7 @@ data Config = Config
     , cfgPostgres            :: !Bool
     , cfgGoogleChrome        :: !Bool
     , cfgEnv                 :: M.Map Version String
+    , cfgMatrixExtra         :: M.Map String (S.Set String)
     , cfgAllowFailures       :: !VersionRange
     , cfgLastInSeries        :: !Bool
     , cfgLinuxJobs           :: !VersionRange
diff --git a/src/HaskellCI/GitHub.hs b/src/HaskellCI/GitHub.hs
index 221f6f11..22431821 100644
--- a/src/HaskellCI/GitHub.hs
+++ b/src/HaskellCI/GitHub.hs
@@ -115,6 +115,13 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
             [ "Using submodules on the GitHub Actions backend requires"
             , "Ubuntu 20.04 (Focal Fossa) or later."
             ]
+    when (length matrix > maxMatrixJobs) $
+        throwErr $ ValidationError $ unwords
+            [ "The matrix has"
+            , show (length matrix)
+            , "jobs, exceeding the limit of"
+            , show maxMatrixJobs ++ "."
+            ]
 
     steps <- sequence $ buildList $ do
         githubRun "apt-get install" $ do
@@ -536,23 +543,7 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                 , ghjServices        = mconcat
                     [ Map.singleton "postgres" postgresService | cfgPostgres ]
                 , ghjTimeout         = max 10 cfgTimeoutMinutes
-                , ghjMatrix          = concat $
-                    -- we can have multiple setup methods for the same
-                    -- compiler version, if jobs overlap.
-                    [ [ GitHubMatrixEntry
-                        { ghmeCompiler     = translateCompilerVersion cfgVersionMapping $ compiler
-                        , ghmeAllowFailure =
-                               isGHCHead compiler
-                            || maybeGHC False (`C.withinRange` cfgAllowFailures) compiler
-                        , ghmeSetupMethod = sp
-                        }
-                        | sp <- [GHCUP, GHCUPvanilla, GHCUPprerelease, HVRPPA]
-                        , compilerWithinGhcRange compiler $ index cfgSetupMethods sp
-                      ]
-                      | compiler <- reverse $ toList linuxVersions
-                      , compiler /= GHCHead -- TODO: Make this work
-                                          -- https://github.com/haskell-CI/haskell-ci/issues/458
-                      ]
+                , ghjMatrix          = matrix
                 })
 
             unless (null cfgIrcChannels) $
@@ -571,6 +562,34 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
     isGHCUP :: CompilerVersion -> Bool
     isGHCUP v = compilerWithinRange v (RangeGHC /\ Range (index cfgSetupMethods GHCUP))
 
+    -- extra matrix fields
+    matrixExtra :: [[(String, String)]]
+    matrixExtra =
+      traverse (\(k, vs) -> fmap (\v -> (k, v)) (toList vs))
+      $ Map.toList cfgMatrixExtra
+
+    mkMatrixEntries :: [(String, String)] -> [GitHubMatrixEntry]
+    mkMatrixEntries extra =
+      [ GitHubMatrixEntry
+        { ghmeCompiler     = translateCompilerVersion cfgVersionMapping $ compiler
+        , ghmeAllowFailure =
+               isGHCHead compiler
+            || maybeGHC False (`C.withinRange` cfgAllowFailures) compiler
+        , ghmeSetupMethod = sp
+        , ghmeMatrixExtra = extra
+        }
+      | compiler <- reverse $ toList linuxVersions
+      , compiler /= GHCHead -- TODO: Make this work
+                            -- https://github.com/haskell-CI/haskell-ci/issues/458
+      , sp <- [GHCUP, GHCUPvanilla, GHCUPprerelease, HVRPPA]
+      , compilerWithinGhcRange compiler $ index cfgSetupMethods sp
+      ]
+
+    matrix :: [GitHubMatrixEntry]
+    matrix = case matrixExtra of
+      [] -> mkMatrixEntries []
+      xs -> xs >>= mkMatrixEntries
+
     -- step primitives
     githubRun' :: String -> Map.Map String String ->  ShM () -> ListBuilder (Either HsCiError GitHubStep) ()
     githubRun' name env shm = item $ do
@@ -788,3 +807,9 @@ ghcRunsOnVer = "ubuntu-24.04"
 translateCompilerVersion :: Map Version Version -> CompilerVersion -> CompilerVersion
 translateCompilerVersion m (GHC v) = GHC (Map.findWithDefault v v m)
 translateCompilerVersion _ x       = x
+
+-- | GitHub has a limit of 256 jobs.
+-- See https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/running-variations-of-jobs-in-a-workflow#using-a-matrix-strategy
+--
+maxMatrixJobs :: Int
+maxMatrixJobs = 256
diff --git a/src/HaskellCI/GitHub/Yaml.hs b/src/HaskellCI/GitHub/Yaml.hs
index adb4a145..b29ec854 100644
--- a/src/HaskellCI/GitHub/Yaml.hs
+++ b/src/HaskellCI/GitHub/Yaml.hs
@@ -47,6 +47,7 @@ data GitHubJob = GitHubJob
 data GitHubMatrixEntry = GitHubMatrixEntry
     { ghmeCompiler     :: CompilerVersion
     , ghmeAllowFailure :: Bool
+    , ghmeMatrixExtra  :: [(String, String)]
     , ghmeSetupMethod  :: SetupMethod
     }
   deriving (Show)
@@ -129,13 +130,13 @@ instance ToYaml GitHubJob where
         item $ "steps" ~> ylistFilt [] (map toYaml $ filter notEmptyStep ghjSteps)
 
 instance ToYaml GitHubMatrixEntry where
-    toYaml GitHubMatrixEntry {..} = ykeyValuesFilt []
+    toYaml GitHubMatrixEntry {..} = ykeyValuesFilt [] $
         [ "compiler"        ~> fromString compiler
         , "compilerKind"    ~> fromString (compilerKind ghmeCompiler)
         , "compilerVersion" ~> fromString (compilerVersion ghmeCompiler)
         , "setup-method"    ~> toYaml ghmeSetupMethod
         , "allow-failure"   ~> toYaml ghmeAllowFailure
-        ]
+        ] ++ fmap (\(k, v) -> k ~> fromString v) ghmeMatrixExtra
       where
         compiler
             | GHCUP <- ghmeSetupMethod
diff --git a/test/Tests.hs b/test/Tests.hs
index 6017158d..e3f446b4 100644
--- a/test/Tests.hs
+++ b/test/Tests.hs
@@ -34,6 +34,8 @@ main = do
             , fixtureGoldenTest "enabled-jobs"
             , fixtureGoldenTest "doctest"
             , fixtureGoldenTest "doctest-version"
+            , fixtureGoldenTest "matrix-extra"
+            , fixtureGoldenTest "matrix-extra-toomany"
             , testGroup "copy-fields"
                 [ fixtureGoldenTest "copy-fields-all"
                 , fixtureGoldenTest "copy-fields-some"