anchor.diff:          pythonPackages.colander
           pythonPackages.translationstring
           pythonPackages.chameleon
  +        pythonPackages.zope_deprecation
  +        pythonPackages.coverage
  +        pythonPackages.nose
         ];
   
       meta = {
  
positive.code:   };
  
    translationstring = buildPythonPackage rec {
      name = "translationstring-0.4";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/t/translationstring/${name}.tar.gz";
        md5 = "392287923c475b660b7549b2c2f03dbc";
      };
  
      meta = {
  
negative.code: 
  
    colander = buildPythonPackage rec {
      name = "colander-1.0a5";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/c/colander/${name}.tar.gz";
        md5 = "569dea523561f5d94338ef9d9a98d249";
      };
  
      propagatedBuildInputs = [ pythonPackages.translationstring ];
  