diff --git a/flake.nix b/flake.nix
index a9581d1..3ed0e68 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,7 +20,7 @@
     poetry = forAllSystems (system: poetry2nix.lib.mkPoetry2Nix {pkgs = pkgs.${system};});
   in {
     # `nix fmt`
-    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);
+    formatter = forAllSystems (system: pkgs.${system}.alejandra);
 
     # `nix build`
     packages = forAllSystems (system: {