anchor.diff:  { lib
   , buildPythonPackage
  +, dpath
   , fetchFromGitHub
   , plac
   , poetry-core
  
positive.code:   ];
  
    propagatedBuildInputs = [
      plac
      pyyaml
    ];
  
negative.code:     owner = "koesterlab";
      repo = pname;
      rev = "refs/tags/v${version}";
      sha256 = "sha256-G3TjIs/EeCqpNuFdb/WZ7PaPtnUdTvbH41OtRypfptg=";
    };
  
    nativeBuildInputs = [
  