diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 1bed725..bd28f0d 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -24,3 +24,6 @@ jobs:
           GITHUB_CONTEXT: ${{ toJson(github) }}
         run: |
           echo "$GITHUB_CONTEXT" | jq . | tee event.json
+      - name: must be failed when merge_group
+        if: github.event_name == 'merge_group'
+        run: exit 1