diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b19041f5..4cab8e6f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -48,4 +48,4 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           min-coverage-overall: 40
           min-coverage-changed-files: 60
-        if: startsWith(matrix.flink, '1.18')
+        if: startsWith(matrix.flink, '1.18') && github.event.pull_request.head.repo.fork == false