anchor.diff: -{ stdenv
  -, lib
  +{ lib
  +, stdenv
   , anyio
   , buildPythonPackage
   , fetchFromGitHub
  
positive.code:     owner = "samuelcolvin";
      repo = pname;
      rev = "refs/tags/v${version}";
      hash = "sha256-DibxoVH7uOy9rxzhiN4HmihA7HtdzErmJOnsI/NWY5I=";
    };
  
    cargoDeps = rustPlatform.fetchCargoTarball {
      inherit src;
      name = "${pname}-${version}";
      hash = "sha256-EakC/rSIS42Q4Y0pvWKG7mzppU5KjCktnC09iFMZM0A=";
    };
  
    nativeBuildInputs = [
  
negative.code:     pytestCheckHook
    ];
  
    postPatch = ''
      sed -i "/^requires-python =.*/a version = '${version}'" pyproject.toml
    '';
  
    preCheck = ''
      rm -rf watchfiles
    '';
  
    pythonImportsCheck = [
      "watchfiles"
    ];
  
    meta = with lib; {
      description = "File watching and code reload";
      homepage = "https://watchfiles.helpmanual.io/";
      license = licenses.mit;
      maintainers = with maintainers; [ fab ];
      broken = stdenv.isDarwin;
    };
  }
  