anchor.diff:  
   
     pysvn = pkgs.stdenv.mkDerivation {
  -    name = "pysvn-1.7.2";
  -
  -    src = fetchurl {
  -      url = "http://pysvn.barrys-emacs.org/source_kits/pysvn-1.7.2.tar.gz";
  -      sha256 = "2b2980d200515e754e00a12d99dbce25c1ea90fddf8cba2bfa354c9305c5e455";
  +    name = "pysvn-1.7.6";
  +
  +    src = fetchurl {
  +      url = "http://pysvn.barrys-emacs.org/source_kits/pysvn-1.7.6.tar.gz";
  +      sha256 = "0wwb9h3rw2r8hzqya8mv5z8pgjpa6y3i15a3cccdv2mil44289a7";
       };
   
       buildInputs = [ python pkgs.subversion pkgs.apr pkgs.aprutil pkgs.expat pkgs.neon pkgs.openssl ]
  
positive.code:     };
    };
  
    taskcoach = buildPythonPackage rec {
      name = "TaskCoach-1.3.8";
  
  
negative.code:       python setup.py backport
        python setup.py configure \
          --apr-inc-dir=${pkgs.apr}/include/apr-1 \
          --apu-inc-dir=${pkgs.aprutil}/include/apr-1 \
          --apr-lib-dir=${pkgs.apr}/lib \
          --svn-root-dir=${pkgs.subversion}
      '' + (if !stdenv.isDarwin then "" else ''
  