diff --git a/.github/workflows/imagebuild.yml b/.github/workflows/imagebuild.yml
index cd2635a..f2c0d55 100644
--- a/.github/workflows/imagebuild.yml
+++ b/.github/workflows/imagebuild.yml
@@ -51,7 +51,7 @@ jobs:
     - name: Build Dockerfile
       uses: docker/build-push-action@v5
       with:
-        context: ./dockerfiles
+        file: ./dockerfiles/${{ matrix.docker_image_name }}
         push: false
         tags: ${{ github.repository_owner }}/${{ matrix.docker_image_name }}:proj-${{ matrix.proj_version }}-rust-${{ matrix.rust_version }}
         build-args: |