diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 04d6213b..95a74c5d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,5 +1,7 @@
 name: build
-on: push
+on:
+  push:
+  pull_request:
 jobs:
   cross-compile-supported:
     strategy: