diff --git a/.github/workflows/ci-snapshot.yml b/.github/workflows/ci-snapshot.yml
index 8c1536a6e0..e2d8f38cdc 100644
--- a/.github/workflows/ci-snapshot.yml
+++ b/.github/workflows/ci-snapshot.yml
@@ -8,6 +8,7 @@ on:
 jobs:
   create-installer:
     runs-on: ubuntu-18.04
+    if: github.repository == 'racket/racket'
 
     steps:
     - uses: actions/checkout@v2