anchor.diff:  , click
   , pydot
   , ipython
  +, packaging
   , pyqt5
   , pyperclip
   , nose
  
positive.code:     rev = "v${version}";
      sha256 = "1aparxiq11y0hbvkayp92w684nyxyyx7mi0n1x6x51g5z6c58vmy";
    };
  
    propagatedBuildInputs = [
      asn1crypto
  
negative.code:   ];
    inherit doCheck;
  
    # If it won't be verbose, you'll see nothing going on for a long time.
    checkPhase = ''
      runHook preCheck
  