diff --git a/.github/workflows/pr-open.yml b/.github/workflows/pr-open.yml
index 38e8a2194..7515d71d8 100644
--- a/.github/workflows/pr-open.yml
+++ b/.github/workflows/pr-open.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: bcgov-nr/action-builder-ghcr@v2.2.0
         id: build
         with:
-          build_args: |
+          build_args:
             --build-arg BUILD_NUMBER=${{ github.event.number }}
             "BUILDKIT_INLINE_CACHE=1"
           package: ${{ matrix.package }}