anchor.diff:  
   
     urwid = buildPythonPackage (rec {
  -    name = "urwid-1.1.1";
  +    name = "urwid-1.2.1";
   
       # multiple:  NameError: name 'evl' is not defined
       doCheck = false;
   
       src = fetchurl {
  -      url = "http://excess.org/urwid/${name}.tar.gz";
  -      md5 = "eca2e0413cf7216b01c84b99e0f2576d";
  +      url = "https://pypi.python.org/packages/source/u/urwid/${name}.tar.gz";
  +      md5 = "6a05ada11b87e7b026b01fc5150855b0";
       };
   
       meta = {
  
positive.code:   });
  
    tweepy = buildPythonPackage (rec {
      name = "tweepy-2.1";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/t/tweepy/${name}.tar.gz";
        sha256 = "1irzwfva7g1k7db708mlxy2qribd6938zwn5xzjzn6i43j5mjysm";
      };
  
      meta = {
  
negative.code:   };
  
    subprocess32 = buildPythonPackage rec {
      name = "subprocess32-3.2.6";
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/s/subprocess32/${name}.tar.gz";
        md5 = "754c5ab9f533e764f931136974b618f1";
      };
  
      doCheck = false;
  