diff --git a/.github/workflows/buildAndTestCMake.yml b/.github/workflows/buildAndTestCMake.yml
index 3688cf90678..3afa1086c3b 100644
--- a/.github/workflows/buildAndTestCMake.yml
+++ b/.github/workflows/buildAndTestCMake.yml
@@ -34,6 +34,8 @@ concurrency:
 
 jobs:
   cmake-build:
+    # Only run scheduled CI on main repo
+    if: (github.repository == 'openxla/stablehlo' || github.event_name != 'schedule')
     name: "cmake-build ${{ github.event_name == 'schedule' && '(llvm-project@HEAD)' || ''}}"
     env:
       LLVM_PROJECT_DIR: "llvm-project"