anchor.diff:      };
     };
   
  +  mitmproxy = buildPythonPackage rec {
  +    baseName = "mitmproxy";
  +    name = "${baseName}-${meta.version}";
  +
  +    src = fetchurl {
  +      url = "${meta.homepage}/download/${name}.tar.gz";
  +      sha256 = "1ddqni6d4kc8ypl6yig4nc00izvbk359sz6hykb9g0lfcpfqlngj";
  +    };
  +    
  +    buildInputs = [
  +      pkgs.pyopenssl pyasn1 urwid pil lxml flask protobuf netlib
  +    ];
  +
  +    doCheck = false;
  +
  +    postInstall = ''
  +      for prog in $out/bin/*; do
  +        wrapProgram "$prog" \
  +          --prefix PYTHONPATH : "$PYTHONPATH"
  +      done
  +    '';
  +
  +    meta = {
  +      version = "0.9";
  +      description = ''Man-in-the-middle proxy'';
  +      homepage = "http://mitmproxy.org/";
  +      license = pkgs.lib.licenses.mit;
  +    };
  +  };
   
     mock = buildPythonPackage (rec {
       name = "mock-1.0.1";
  
positive.code:     };
    };
  
  
    nevow = buildPythonPackage (rec {
      name = "nevow-${version}";
  
negative.code: 
  
    pyasn1 = buildPythonPackage ({
      name = "pyasn1-0.1.7";
  
      src = fetchurl {
        url = "mirror://sourceforge/pyasn1/0.1.7/pyasn1-0.1.7.tar.gz";
        sha256 = "1aqy21fb564gmnkw2fbkn55c40diyx3z0ixh4savvxikqm9ivy74";
      };
  
      meta = {
  