anchor.diff:  
     nose = buildPythonPackage {
       name = "nose-0.11.3";
  -    
  +
       src = fetchurl {
         url = http://python-nose.googlecode.com/files/nose-0.11.3.tar.gz;
         sha256 = "1hl3lbwdfl2a64q3dxc73kbiks4iwx5cixlbavyryd8xdr7iziww";
       };
  -    
  +
       meta = {
         description = "A unittest-based testing framework for python that makes writing and running tests easier";
       };
  
positive.code:     };
    });
  
    pysvn = pkgs.stdenv.mkDerivation {
      name = "pysvn-1.7.2";
  
  
negative.code:       homepage = http://www.darwinsys.com/file/;
      };
    };
  
    MySQL_python = buildPythonPackage {
      name = "MySQL-python-1.2.3";
  
      doCheck = false;
  
      src = fetchurl {
        url = mirror://sourceforge/mysql-python/MySQL-python-1.2.3.tar.gz;
        sha256 = "0vkyg9dmj29hzk7fy77f42p7bfj28skyzsjsjry4wqr3z6xnzrkx";
      };
  
      propagatedBuildInputs = [ pkgs.mysql pkgs.zlib nose ];
  
      meta = {
        description = "MySQL database binding for Python";
  
  