diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6df388f946..cde2ee58b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -302,7 +302,7 @@ jobs:
         if: steps.ninja-build-cache.outputs.cache-hit != 'true'
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.13"
 
       - name: Setup MSVC for ninja build (Windows)
         if: steps.ninja-build-cache.outputs.cache-hit != 'true' && runner.os == 'Windows'
diff --git a/ninja/configure.py b/ninja/configure.py
index 808408dc61..b0fb998988 100755
--- a/ninja/configure.py
+++ b/ninja/configure.py
@@ -23,7 +23,7 @@
 
 from optparse import OptionParser
 import os
-import pipes
+import shlex
 import string
 import subprocess
 import sys
@@ -257,7 +257,7 @@ def _run_command(self, cmdline):
 env_keys = set(['CXX', 'AR', 'CFLAGS', 'CXXFLAGS', 'LDFLAGS'])
 configure_env = dict((k, os.environ[k]) for k in os.environ if k in env_keys)
 if configure_env:
-    config_str = ' '.join([k + '=' + pipes.quote(configure_env[k])
+    config_str = ' '.join([k + '=' + shlex.quote(configure_env[k])
                            for k in configure_env])
     n.variable('configure_env', config_str + '$ ')
 n.newline()
diff --git a/scripts/buildNinjaBinary.js b/scripts/buildNinjaBinary.js
index 0bfc6f8dfe..dc09eaf0cc 100755
--- a/scripts/buildNinjaBinary.js
+++ b/scripts/buildNinjaBinary.js
@@ -6,7 +6,7 @@ import { execSync } from "node:child_process";
 import { ninjaDir } from "#dev/paths";
 
 const platform = process.platform;
-const buildCommand = "python configure.py --bootstrap --verbose";
+const buildCommand = "python3 configure.py --bootstrap --verbose";
 
 if (platform === "win32") {
   // On Windows, the build uses the MSVC compiler which needs to be on the path.