diff --git a/mps/.github/workflows/c-cpp.yml b/mps/.github/workflows/c-cpp.yml
index b716fc74d51..d628faa77cb 100644
--- a/mps/.github/workflows/c-cpp.yml
+++ b/mps/.github/workflows/c-cpp.yml
@@ -17,6 +17,8 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
 
+    runs-on: ${{ matrix.os }}
+
     steps:
     - uses: actions/checkout@v3
     - name: configure