anchor.diff:  { lib
   , isPy27
   , buildPythonPackage
  -, fetchPypi
  +, fetchFromGitHub
   , aiohttp
   , demjson
   , python
  
positive.code: 
    disabled = isPy27;
  
    src = fetchPypi {
      pname = "PySyncThru";
      inherit version;
      sha256 = "13564018a7de4fe013e195e19d7bae92aa224e0f3a32373576682722d3dbee52";
    };
  
    propagatedBuildInputs = [
  
negative.code:     ${python.interpreter} -m unittest
    '';
  
    pythonImportsCheck = [ "pysyncthru" ];
  
    meta = with lib; {
  