diff --git a/.forgejo/workflows/nix_build.yaml b/.forgejo/workflows/nix_build.yaml
index 44cc4de..cfa0076 100644
--- a/.forgejo/workflows/nix_build.yaml
+++ b/.forgejo/workflows/nix_build.yaml
@@ -2,6 +2,9 @@ name: Build all NixOS Configurations
 
 on:
   push:
+    branches:
+      - main
+      - update
   schedule:
     - cron: "20 12 * * *" # not to frequent, GitHub only allows a few pulls per hour