diff --git a/.github/workflows/build-machines-and-homes.yml b/.github/workflows/build-machines-and-homes.yml
index 76fcb36..6ae6746 100644
--- a/.github/workflows/build-machines-and-homes.yml
+++ b/.github/workflows/build-machines-and-homes.yml
@@ -2,6 +2,7 @@ name: build and cache machines and homes
 on:
   workflow_dispatch:
   push:
+  pull_request:
 jobs:
   build-machines:
     strategy: