diff --git a/.github/workflows/package.yaml b/.github/workflows/package.yaml
index 50a1b0f9ef..88331a3a9e 100644
--- a/.github/workflows/package.yaml
+++ b/.github/workflows/package.yaml
@@ -94,7 +94,8 @@ jobs:
       if: ${{ github.event_name == 'push' && matrix.network == 'mainnet' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:latest
@@ -106,7 +107,8 @@ jobs:
       if: ${{ github.event_name == 'push' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:latest-${{ matrix.network }}
@@ -118,7 +120,8 @@ jobs:
       if: ${{ github.event_name == 'push' && matrix.network == 'mainnet' && startsWith(github.ref, 'refs/tags') && matrix.target == 'cardano-node-ogmios' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:${{ steps.tag-variables.outputs.tag }}_${{ matrix.cardano_node_version }}
@@ -130,7 +133,9 @@ jobs:
       if: ${{ github.event_name == 'push' && matrix.network == 'mainnet' && startsWith(github.ref, 'refs/tags') && matrix.target == 'ogmios' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}, CARDANO_NODE_VERSION=${{ matrix.cardano_node_version }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
+          CARDANO_NODE_VERSION=${{ matrix.cardano_node_version }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:${{ steps.tag-variables.outputs.tag }}_${{ matrix.cardano_node_version }}
@@ -142,7 +147,9 @@ jobs:
       if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') && matrix.target == 'cardano-node-ogmios' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}, CARDANO_NODE_VERSION=${{ matrix.cardano_node_version }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
+          CARDANO_NODE_VERSION=${{ matrix.cardano_node_version }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:${{ steps.tag-variables.outputs.tag }}_${{ matrix.cardano_node_version }}-${{ matrix.network }}
@@ -154,7 +161,8 @@ jobs:
       if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') && matrix.target == 'ogmios' }}
       uses: docker/build-push-action@v2
       with:
-        build-args: NETWORK=${{ matrix.network }}
+        build-args: |
+          NETWORK=${{ matrix.network }}
         context: .
         push: true
         tags: ${{ steps.base-variables.outputs.image }}:${{ steps.tag-variables.outputs.tag }}-${{ matrix.network }}