anchor.diff:      "
     '';
   
  +  preFixup = ''
  +    wrapPythonPrograms
  +  '';
  +
     passthru = {
       inherit version;
     };
  
positive.code:     setuptools_egg
      unzip
      wheel_egg
    ];
  
    installPhase = ''
  
negative.code: , setuptools_egg
  , unzip
  , wheel_egg
  , wrapPython
  }:
  
  let
  