anchor.diff:    version = "1.7.7";
     format = "pyproject";
   
  -  disabled = pythonOlder "3.6.1";
  +  disabled = pythonOlder "3.7";
   
  -  src = pkgs.fetchFromGitHub {
  +  src = fetchFromGitHub {
       owner = "PyCQA";
       repo = pname;
       rev = version;
       hash = "sha256-sbPZmVeJtNphtjuZEfKcUgty9bJ3E/2Ya9RuX3u/XEs=";
     };
  -
  -  postPatch = ''
  -    substituteInPlace pyproject.toml \
  -      --replace 'pep8-naming = ">=0.3.3,<=0.10.0"' 'pep8-naming = "*"' \
  -      --replace 'mccabe = "^0.6.0"' 'mccabe = "*"'
  -  '';
   
     nativeBuildInputs = [
       poetry-core
  
positive.code:     pytestCheckHook
    ];
  
    meta = with lib; {
      description = "Tool to analyse Python code and output information about errors, potential problems, convention violations and complexity";
      homepage = "https://github.com/PyCQA/prospector";
  
negative.code: { lib
  , fetchFromGitHub
  , python3
  }:
  
  