diff --git a/.github/workflows/build-standalone-on-merge.yaml b/.github/workflows/build-standalone-on-merge.yaml
index f1ee750a..445abd0c 100644
--- a/.github/workflows/build-standalone-on-merge.yaml
+++ b/.github/workflows/build-standalone-on-merge.yaml
@@ -38,7 +38,4 @@ jobs:
       packages: write
       id-token: write
     with:
-      # For PR-triggered runs github.ref_name is "<prNumber>/merge" (not a real
-      # branch), which breaks the upload gate. Leave CI_BRANCH empty for PRs so
-      # the gate is skipped; use the real branch name for push events.
-      CI_BRANCH: ${{ github.event_name == 'pull_request' && '' || github.ref_name }}
+      CI_BRANCH: ${{ github.event_name == 'push' && github.ref_name || '' }}