{
  inputs = {
    treefmt-nix.url = "github:JordanForks/treefmt-nix";
  };

  outputs = { self, nixpkgs, systems, treefmt-nix }:
    let
      eachSystem = f: nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
      treefmtEval = eachSystem (pkgs: treefmt-nix.lib.evalModule pkgs ./treefmt.nix);
    in
    {
      formatter = eachSystem (pkgs: treefmtEval.${pkgs.system}.config.build.wrapper);
      checks = eachSystem (pkgs: {
        formatting = treefmtEval.${pkgs.system}.config.build.check self;
      });
    };
}