diff --git a/.github/workflows/key4hep-build-cvmfs.yaml b/.github/workflows/key4hep-build-cvmfs.yaml
index 552bd47f..e66c38ac 100644
--- a/.github/workflows/key4hep-build-cvmfs.yaml
+++ b/.github/workflows/key4hep-build-cvmfs.yaml
@@ -5,6 +5,7 @@ on:
   workflow_dispatch:
 
 jobs:
+  runs-on: ubuntu-latest
   test:
     steps:
     - uses: actions/checkout@v3