anchor.diff:  
   
     alot = buildPythonPackage rec {
  -    rev = "27c91058c49d8755d2813d5b78094f40f36ec905";
  +    rev = "5ed59825ffaeaacea90ea10be4b932c60428ed8e";
       name = "alot-0.3.3_${rev}";
   
       src = fetchurl {
         url = "https://github.com/pazz/alot/tarball/${rev}";
         name = "${name}.tar.bz";
  -      sha256 = "67e1033aa91818b7fa4c3911430a4da0f73aca92c3e3832c010038cbf263eec2";
  +      sha256 = "1b724d47bf766ba3ca7cb6d27c7bb597dbc67dcae1347c5a0f01f80c2246ca07";
       };
   
       doCheck = false;
  
positive.code: 
  
    flake8 = buildPythonPackage (rec {
      name = "flake8-1.4";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/f/flake8/${name}.tar.gz";
        md5 = "64acc2c905178f6d6817d88574407fb5";
      };
  
      doCheck = false;
  
negative.code:   };
  
    turses = buildPythonPackage (rec {
      name = "turses-0.2.8";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/t/turses/${name}.tar.gz";
  