diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index b2277d9..cea7880 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -39,6 +39,7 @@ permissions:
 
 jobs:
   build_wheels:
+    if: github.repository == 'numpy/numpy-release'
     name: Build wheel ${{ matrix.python }}-${{ matrix.buildplat[1] }}-${{ matrix.buildplat[2] }}
     runs-on: ${{ matrix.buildplat[0] }}
     strategy: