diff --git a/.forgejo/workflows/package-debug.yaml b/.forgejo/workflows/package-debug.yaml
index 30b183a..5b1d93e 100644
--- a/.forgejo/workflows/package-debug.yaml
+++ b/.forgejo/workflows/package-debug.yaml
@@ -35,6 +35,7 @@ jobs:
           file: ./StalwartSimpleLoginMiddleware/Dockerfile
           platforms: linux/amd64
           push: true
+          build-args: |
             BUILD_CONFIGURATION=Debug
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}