anchor.diff:  
     pytest = self.pytest_34;
   
  -  pytest_34 = callPackage ../development/python-modules/pytest/default.nix{
  +  pytest_34 = callPackage ../development/python-modules/pytest {
       hypothesis = self.hypothesis.override {
         # hypothesis requires pytest that causes dependency cycle
         doCheck = false;
  
positive.code:     };
    };
  
    cccolutils = callPackage ../development/python-modules/cccolutils/default.nix {};
  
    CDDB = buildPythonPackage rec {
      name = "CDDB-1.4";
  
negative.code:     };
    });
  
    MechanicalSoup = callPackage ../development/python-modules/MechanicalSoup { };
  
    meld3 = buildPythonPackage rec {
      name = "meld3-1.0.0";
  