anchor.diff:      sha256 = "1q4rky0a6n4izmq7slb91a54g8swry1xrbfqxwc8lkd3hhvlxxkl";
     };
   
  +  postPatch = ''
  +    substituteInPlace test/test.py --replace "expect_exit_codes={0} if sys.stdin.isatty() else {2}" "expect_exit_codes={0}"
  +  '';
  +
     propagatedBuildInputs = [
       pyyaml
       xmltodict
  
positive.code:   doCheck = true;
  
    checkInputs = [
     unixtools.script
     pytest
     coverage
     flake8
  
negative.code:    toml
    ];
  
    checkPhase = "pytest ./test/test.py";
  
    pythonImportsCheck = [ "yq" ];
  
  