diff --git a/.github/workflows/check-flake.yml b/.github/workflows/check-flake.yml
index 95557108..fe410d6f 100644
--- a/.github/workflows/check-flake.yml
+++ b/.github/workflows/check-flake.yml
@@ -1,5 +1,6 @@
 name: Check Nix flake
 on:
+  pull_request:
   pull_request_target:
     paths:
         - '*.nix'