diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b61a67eb3..0d88f950f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,7 +1,10 @@
 name: Meson
 
 on:
-  [push]
+  pull_request:
+  push:
+    branches:
+      - main
 
 jobs:
   nix-build-develop-gcc:
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 2b13ff427..1a0cf92b7 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -1,7 +1,10 @@
 name: Nix build
 
 on:
-  [push]
+  pull_request:
+  push:
+    branches:
+      - main
 
 jobs:
   flake-default:
diff --git a/.github/workflows/treefmt.yml b/.github/workflows/treefmt.yml
index 5802f16a5..f4269f570 100644
--- a/.github/workflows/treefmt.yml
+++ b/.github/workflows/treefmt.yml
@@ -1,7 +1,10 @@
 name: Check formatting with treefmt
 
 on:
-  [push]
+  pull_request:
+  push:
+    branches:
+      - main
 
 jobs:
   treefmt: