diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cc6e6cb..00db62f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -25,6 +25,8 @@
   build:
     name: Update Discovery Artifacts PR
     runs-on: ubuntu-latest
+    if: |
+      ${{github.repository == 'googleapis/google-api-python-client'}}
     steps:
       - name: Get current date
         id: date