diff --git a/.github/workflows/build-slurm-packages.yml b/.github/workflows/build-slurm-packages.yml
index f171c48..1f21ad1 100644
--- a/.github/workflows/build-slurm-packages.yml
+++ b/.github/workflows/build-slurm-packages.yml
@@ -41,5 +41,5 @@ jobs:
         with:
           push: true
           tags: scalableminds/slurmctl:${{ github.ref_name }}
-          build-args:
-            - SLURM_VERSION=${{ github.ref_name }}
+          build-args: |
+            SLURM_VERSION=${{ github.ref_name }}