diff --git a/.github/workflows/pr-release.yml b/.github/workflows/pr-release.yml
index 943914ac9f6e..6821c4aa711d 100644
--- a/.github/workflows/pr-release.yml
+++ b/.github/workflows/pr-release.yml
@@ -16,20 +16,16 @@ on:
 jobs:
   on-success:
     runs-on: ubuntu-latest
-    if: github.event.workflow_run.conclusion == 'success' && github.repository == 'leanprover/lean4'
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request' && github.repository == 'leanprover/lean4'
     steps:
-      - name: Retrieve PR number and head commit
+      - name: Set PR number and head commit
         uses: actions/github-script@v7
         id: workflow-info
         with:
           script: |
-            const reply = await github.rest.actions.getWorkflowRun({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                run_id: context.payload.workflow_run.id,
-            })
-            core.setOutput('pullRequestNumber', reply.data.pull_requests[0].number)
-            core.setOutput('sourceHeadSha',     reply.data.pull_requests[0].head.sha)
+            // console.log(`context.payload: ${JSON.stringify(context.payload, null, 2)}`)
+            core.setOutput('pullRequestNumber', context.payload.workflow_run.pull_requests[0].number)
+            core.setOutput('sourceHeadSha',     context.payload.workflow_run.pull_requests[0].head.sha)
 
       - name: Download artifact from the previous workflow.
         if: ${{ steps.workflow-info.outputs.pullRequestNumber != '' }}