diff --git a/.github/workflows/cross-build.yml b/.github/workflows/cross-build.yml
index 0bda0a980..07b6fdaed 100644
--- a/.github/workflows/cross-build.yml
+++ b/.github/workflows/cross-build.yml
@@ -1,8 +1,8 @@
 name: RISC V and PowerPC 64
 
 on:
-  push:
-  pull_request:
+  schedule:
+    - cron: '0 0 */2 * *'
 
 permissions:
   contents: read