anchor.diff:      };
     };
   
  +  
     jinja2 = buildPythonPackage {
       name = "jinja2-2.2.1";
   
  
positive.code:     };
    };
  
    gflags = buildPythonPackage rec {
      name = "gflags-1.5.1";
  
  
negative.code:     };
    });
  
    
    netaddr = buildPythonPackage rec {
      name = "netaddr-0.7.5";
  
      src = fetchurl {
        url = "https://github.com/downloads/drkjam/netaddr/${name}.tar.gz";
        sha256 = "0ssxic389rdc79zkz8dxcjpqdi5qs80h12khkag410cl9cwk11f2";
      };
  
      doCheck = false; # there is no test command
  
      meta = {
        homepage = https://github.com/drkjam/netaddr/;
        description = "A network address manipulation library for Python";
      };
    };
  
    
    nevow = buildPythonPackage (rec {
      name = "nevow-${version}";
      version = "0.10.0";
  