diff --git a/.github/workflows/merge.yml b/.github/workflows/merge.yml
index 258f780a0..59a81b07e 100755
--- a/.github/workflows/merge.yml
+++ b/.github/workflows/merge.yml
@@ -6,9 +6,12 @@ on:
   merge_group:
     types: [checks_requested]
   workflow_dispatch:
+env:
+  SINGULARITY: 1
 jobs:
   build-reuse-manifest:
     runs-on: ubuntu-latest
+
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5