diff --git a/.forgejo/workflows/build.yml b/.forgejo/workflows/build.yml
index 6f18bb975..a93e02cf4 100644
--- a/.forgejo/workflows/build.yml
+++ b/.forgejo/workflows/build.yml
@@ -218,24 +218,11 @@ jobs:
             });
 
             const {owner, repo} = context.repo;
-            const run_id = ${{forgejo.event.workflow_run.id}};
-            const pull_head_sha = '${{forgejo.event.workflow_run.head_sha}}';
+            const run_id = ${{ forgejo.run_id }};
+            const pull_head_sha = '${{ forgejo.event.workflow_run.head_sha }}';
 
-            const issue_number = await (async () => {
-              const pulls = await forgejo.rest.pulls.list({owner, repo});
-              for await (const {data} of forgejo.paginate.iterator(pulls)) {
-                for (const pull of data) {
-                  if (pull.head.sha === pull_head_sha) {
-                    return pull.number;
-                  }
-                }
-              }
-            })();
-            if (issue_number) {
-              core.info(`Using pull request ${issue_number}`);
-            } else {
-              return core.error(`No matching pull request found`);
-            }
+            const issue_number = ${{ forgejo.event.pull_request.number }};
+            core.info(`Using pull request ${issue_number}`);
 
             const {data: {artifacts}} = await forgejo.rest.actions.listWorkflowRunArtifacts({owner, repo, run_id});
             if (!artifacts.length) {