diff --git a/.github/workflows/concretize.yaml b/.github/workflows/concretize.yaml
index 796bd291..a1362a14 100644
--- a/.github/workflows/concretize.yaml
+++ b/.github/workflows/concretize.yaml
@@ -5,10 +5,6 @@ on:
   pull_request:
   workflow_dispatch:
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
   concretize:
     strategy:
@@ -16,6 +12,9 @@ jobs:
         image: [alma9, ubuntu22]
         build_type: [release, nightly]
     runs-on: ubuntu-latest
+    concurrency:
+    group: ${{ github.workflow }}-${{ github.ref }}-${{ matrix.image }}-${{ matrix.build_type }}
+    cancel-in-progress: true
     steps:
       - uses: actions/checkout@v4
       - name: Start container