diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b081427..3b738fb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -49,6 +49,7 @@ jobs:
           uv pip install --system ipywidgets
 
       - uses: aws-actions/configure-aws-credentials@v4
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}