diff --git a/.github/workflows/sync-and-build-plugins.yaml b/.github/workflows/sync-and-build-plugins.yaml
index ccd1f8aff2..b7120c1148 100644
--- a/.github/workflows/sync-and-build-plugins.yaml
+++ b/.github/workflows/sync-and-build-plugins.yaml
@@ -35,7 +35,7 @@ jobs:
           git rebase --stat geth/master
       - name: "build the docker image to ensure project still builds"
         if: steps.diffcheck.outputs.stdout != '0'
-        run: docker build . --tag ghcr.io/kilnfi/pgeth:latest --tag ghcr.io/kilnfi/pgeth:${GITHUB_SHA}
+        run: docker build -f Dockerfile.plugins . --tag ghcr.io/kilnfi/pgeth:latest --tag ghcr.io/kilnfi/pgeth:${GITHUB_SHA}
       - name: "push rebased master branch"
         if: steps.diffcheck.outputs.stdout != '0'
         run: git push origin master --force