anchor.diff:    inherit (pythonPackages)
       isPy3k;
   in
  -
   buildPythonPackage rec {
     name = "bazaar-${version}";
       versionMajor = "2.7";
  
positive.code:   disabled = isPy3k;
  
    meta = with stdenv.lib; {
      description = "Bazaar is a next generation distributed version control system";
      homepage = http://bazaar-vcs.org/;
      license = licenses.gpl2;
      maintainers = with maintainers; [
  
negative.code:     version = "${versionMajor}.${versionMinor}";
  
    src = fetchurl {
      url = "http://launchpad.net/bzr/${versionMajor}/${version}/+download/"
        + "bzr-${version}.tar.gz";
      sha256 = "1cysix5k3wa6y7jjck3ckq3abls4gvz570s0v0hxv805nwki4i8d";
    };
  
  