anchor.diff:      };
     });
   
  +  reportlab = 
  +   let freetype = pkgs.lib.overrideDerivation pkgs.freetype (args: { configureFlags = "--enable-static --enable-shared"; });
  +   in buildPythonPackage rec {
  +    name = "reportlab-2.5";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/r/reportlab/${name}.tar.gz";
  +      md5 = "cdf8b87a6cf1501de1b0a8d341a217d3";
  +    };
  +
  +    buildInputs = [freetype];
  +    doCheck = false; 
  +
  +    meta = {
  +      description = "The ReportLab Toolkit. An Open Source Python library for generating PDFs and graphics.";
  +      homepage = http://www.reportlab.com/;
  +    };
  +  };
  +
     rdflib = buildPythonPackage (rec {
       name = "rdflib-3.0.0";
   
  
positive.code:     meta = {
        description = "A Python re-implementation of the Rails routes system for mapping URLs to application actions";
        homepage = http://routes.groovie.org/;
      };
    };
  
  
negative.code: 
  
    matplotlib = buildPythonPackage ( rec {
      name = "matplotlib-1.0.1";
      src = fetchurl {
        url = "http://downloads.sourceforge.net/matplotlib/${name}.tar.gz";
        sha256 = "1xksjix227n9hm6jnhlwkdf1yf1zgz18665cisqk8grv6xvn7g43";
      };
  
      doCheck = false;
  