diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 613e810..11fe308 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -17,5 +17,6 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - run: |
+          nix run .#check
           nix run .#test
           nix run .#readme
diff --git a/flake.nix b/flake.nix
index a976c8c..2ce2397 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,6 +45,11 @@
         fi
       '';
 
+      # nix run .#check
+      apps.check = env.app [] ''
+        zig fmt --check .
+      '';
+
       # nix run .#docs
       apps.docs = env.app [] "zig build docs -- \"$@\"";