diff --git a/.github/workflows/build-docker.yaml b/.github/workflows/build-docker.yaml
index 4d06b95..51bdc02 100644
--- a/.github/workflows/build-docker.yaml
+++ b/.github/workflows/build-docker.yaml
@@ -63,6 +63,9 @@ jobs:
             suffix: "-slim"
 
     steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
       - name: Download slim image artifact
         uses: actions/download-artifact@v4
         with:
@@ -97,7 +100,7 @@ jobs:
       - name: Build and push image
         uses: docker/build-push-action@v5
         with:
-          context: "{{defaultContext}}:docker"
+          context: ./docker
           file: ${{ matrix.dockerfile }}
           push: ${{ github.event_name == 'push' }}
           outputs: type=docker,dest=/tmp/slim.tar # output for sharing