diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4a75242..00c93ea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,8 @@ on:
   push:
     paths-ignore:
     - '**.md'
+    branches:
+      - master
 
 jobs:
   nixpkgs-fmt: