{
  description = "roll - for initiative!";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/master";
    pre-commit.url = "github:cachix/pre-commit-hooks.nix";
    pre-commit.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = inputs@{ flake-parts, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      imports = [
        inputs.pre-commit.flakeModule
      ];
      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
      perSystem = { config, self', inputs', pkgs, system, ... }:
        let
          buildPkgs = builtins.attrValues {
            inherit (pkgs.python311Packages)
              hatchling
              tomli
              ;
            hatch = pkgs.hatch.override {
              python3 = pkgs.python311;
            };
          };
          package = pkgs.python311.pkgs.buildPythonApplication {
            pname = "roll";
            version = "0.1.0";
            src = ./.;
            format = "pyproject";

            nativeBuildInputs = buildPkgs;
          };
        in
        {
          pre-commit.settings.hooks = {
            autoflake.enable = true;
            black.enable = true;
            # mypy.enable = true;
            ruff.enable = true;
          };
          packages.default = package;
          devShells.default = pkgs.mkShell {
            shellHook = ''
              ${config.pre-commit.installationScript}
              echo "welcome to your python project >~(:)=====--" 1>&2
            '';
            nativeBuildInputs = buildPkgs;
            buildInputs = builtins.attrValues {
              inherit (pkgs)
                autoflake
                black
                pyright
                ruff
                ;
              inherit (pkgs.python311Packages)
                ipython
                ;
              roll = package;
            };
          };
        };
    };
}