anchor.diff:      };
     });
   
  -
  +  # XXX: currently fails to build
     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-1.7.5";
  +
  +    src = fetchurl {
  +      url = "http://pysvn.barrys-emacs.org/source_kits/pysvn-1.7.5.tar.gz";
  +      sha256 = "cb9664de62a85adba8471eda1894c3831d3400131feeea0e7b9cdd7c15d671ef";
       };
   
       buildInputs = [ python pkgs.subversion pkgs.apr pkgs.aprutil pkgs.expat pkgs.neon pkgs.openssl ]
  
positive.code:   };
  
    hgsvn = buildPythonPackage rec {
      name = "hgsvn-0.1.8";
      src = fetchurl rec {
        name = "hgsvn-0.1.8.tar.gz";
        url = "http://pypi.python.org/packages/source/h/hgsvn/${name}.tar.gz#md5=56209eae48b955754e09185712123428";
        sha256 = "18a7bj1i0m4shkxmdvw1ci5i0isq5vqf0bpwgrhnk305rijvbpch";
      };
  
      buildInputs = [ pkgs.setuptools ];
      doCheck = false;
  
      meta = {
        description = "HgSVN";
  
negative.code:   };
  
    pylint = buildPythonPackage rec {
      name = "pylint-0.25.1";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pylint/${name}.tar.gz";
        md5 = "728bbc2b339bc3749af013709a7f87a5";
      };
      propagatedBuildInputs = [ astng ];
    };
  
    pymacs = pkgs.stdenv.mkDerivation rec {
  