diff --git a/.github/workflows/hermetic_library_generation.yaml b/.github/workflows/hermetic_library_generation.yaml
index 3ea9ae43e..75183c673 100644
--- a/.github/workflows/hermetic_library_generation.yaml
+++ b/.github/workflows/hermetic_library_generation.yaml
@@ -19,6 +19,8 @@ on:
 
 jobs:
   library_generation:
+    # skip pull requests come from a forked repository
+    if: github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4