anchor.diff:      meta = {
         description = "A Python re-implementation of the Rails routes system for mapping URLs to application actions";
         homepage = http://routes.groovie.org/;
  +    };
  +  };
  +
  +
  +  scipy = buildPythonPackage rec {
  +    name = "scipy-0.9.0";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/s/scipy/${name}.tar.gz";
  +      md5 = "ebfef6e8e82d15c875a4ee6a46d4e1cd";
  +    };
  +
  +    buildInputs = [pkgs.gfortran];
  +    propagatedBuildInputs = [ numpy ];
  +    doCheck = false; 
  +
  +    # TODO: add ATLAS=${pkgs.atlas}
  +    installCommand = ''
  +      export BLAS=${pkgs.blas} LAPACK=${pkgs.liblapack}
  +      python setup.py build --fcompiler="gnu95"
  +      python setup.py install --prefix=$out
  +    '';
  +
  +    meta = {
  +      description = "SciPy (pronounced 'Sigh Pie') is open-source software for mathematics, science, and engineering. ";
  +      homepage = http://www.scipy.org/;
       };
     };
   
  
positive.code: 
  
    matplotlib = buildPythonPackage ( rec {
      name = "matplotlib-0.99.1.2";
  
      src = fetchurl {
        url = "http://downloads.sourceforge.net/matplotlib/${name}.tar.gz";
        sha256 = "12lhwgkahck795946hb8wp605c912zq9ds8067ybbifqs56q24b9";
      };
  
      doCheck = false;
  
negative.code:         };
        };
  
    pyreport = buildPythonPackage (rec {
      name = "pyreport-0.3.4c";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pyreport/${name}.tar.gz";
        md5 = "3076164a7079891d149a23f9435581db";
      };
  
      doCheck = false;
  
      meta = {
        homepage = http://pypi.python.org/pypi/pyreport;
        license = "BSD";
        description = "Pyreport makes notes out of a python script.";
      };
    });
  
  
    pysqlite = buildPythonPackage (rec {
      name = "pysqlite-2.5.5";
  
  