diff --git a/.github/workflows/vm.yml b/.github/workflows/vm.yml
index 8404433ac..a542a82fd 100644
--- a/.github/workflows/vm.yml
+++ b/.github/workflows/vm.yml
@@ -14,7 +14,7 @@ jobs:
   ubuntu2004-LTS-cloud-base:
     runs-on: [ self-hosted, linux, vm ]
 
-    if: "!contains(github.event.head_commit.message, '[ci skip]')"
+    if: "(github.repository == 'tailscale/tailscale') && !contains(github.event.head_commit.message, '[ci skip]')"
 
     steps:
       - name: Set GOPATH