{ self, nixpkgs, treefmt-nix, flake-utils, pre-commit-hooks, ... }: flake-utils.lib.eachDefaultSystem ( system: let pkgs = nixpkgs.legacyPackages.${system}; treefmtEval = treefmt-nix.lib.evalModule pkgs ./treefmt.nix; treefmtWrapper = treefmtEval.config.build.wrapper; in { packages.formatter = treefmtWrapper; formatter = self.packages.${system}.formatter; checks.pre-commit-check = pre-commit-hooks.lib.${system}.run { src = ./.; hooks = { treefmt = { enable = true; package = treefmtWrapper; }; }; }; } )