anchor.diff:  
   
     libcloud = buildPythonPackage (rec {
  -    name = "libcloud-0.3.1";
  -
  -    src = fetchurl {
  -      url = mirror://apache/incubator/libcloud/apache-libcloud-incubating-0.3.1.tar.bz2;
  -      sha256 = "11qilrs4sd4c1mkd64ikrjsc2vwrshhc54n5mh4xrark9c7ayp0y";
  -    };
  -
  -    buildInputs = [ zopeInterface ];
  +    name = "libcloud-0.8.0";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/a/apache-libcloud/apache-${name}.tar.bz2";
  +      md5 = "b0ed4698b2be329f2339a77fd40ca7ff";
  +    };
  +
  +    buildInputs = [ mock zopeInterface ];
   
       preConfigure = "cp test/secrets.py-dist test/secrets.py";
   
  
positive.code:       md5 = "530a0614de3a669314c3acd4995c54d5";
      };
  
      buildInputs = [ nose ];
  
      propagatedBuildInputs = [ amqplib anyjson ];
  
      doCheck = false; # depends on the network
  
      meta = {
        homepage = http://pypi.python.org/pypi/carrot;
        description = "AMQP Messaging Framework for Python";
      };
    };
  
  
negative.code:     name = "pycurl-7.19.0";
  
      src = fetchurl {
        url = "http://pycurl.sourceforge.net/download/pycurl-7.19.0.tar.gz";
        sha256 = "0hh6icdbp7svcq0p57zf520ifzhn7jw64x07k99j7h57qpy2sy7b";
      };
  
      buildInputs = [ libcurl ];
  
      doCheck = false;
  
      meta = {
        homepage = http://pycurl.sourceforge.net/;
  