diff --git a/flake.nix b/flake.nix
index 799d020..fc479a7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,8 @@
     inherit (nixpkgs.lib) makeOverridable nixosSystem;
     system = "x86_64-linux";
   in {
+    formatter.${system} = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
+
     packages.${system} = let
       pkgs = (import nixpkgs {
         inherit system;