{ pkgs ? import <nixpkgs> { }, lint ? false }:
pkgs.python3Packages.callPackage
({ lib, buildPythonPackage, mypy, autopep8, pylint, }:
  buildPythonPackage rec {
    pname = "rfc1751";
    version = "0.1.0";
    src = lib.cleanSource ./.;
    nativeCheckInputs = [ mypy ] ++ lib.optionals lint [ autopep8 pylint ];
    doCheck = true;
    checkPhase = "./test.sh";
    meta = { license = lib.licenses.isc; };
  }) { }