anchor.diff: -{ lib
  +{ stdenv
  +, lib
   , buildPythonPackage
   , fetchPypi
   , isPyPy
  
positive.code:       standard library and on the strengths of Python as a high-level
        programming language.
      '';
      maintainers = with lib.maintainers; [ edwtjo ];
      license = lib.licenses.gpl3Plus;
    };
  }
  
negative.code:     ${python.interpreter} -m unittest discover -s tests
    '';
  
    meta = with lib; {
      homepage = http://cvxopt.org/;
      description = "Python Software for Convex Optimization";
      longDescription = ''
  