diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 09d3fddde50e987036d588455cca3a177779059c..35edbdec5dd2abb1f1a328ef5ded2ad01fb93371 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,7 +42,7 @@     steps:
     - name: Checkout repository
       uses: actions/checkout@v2.4.0
     - name: Install nix
-  push:
+      - master
   pull_request:
       with:
         nix_path: "${{ matrix.nixPath }}"