anchor.diff:  }:
   
   let
  -  inherit (pythonPackages)
  -    isPy3k;
  +  versionMajor = "2.7";
  +  versionMinor = "0";
  +  version = "${versionMajor}.${versionMinor}";
   in
   buildPythonPackage rec {
     name = "bazaar-${version}";
  -    versionMajor = "2.7";
  -    versionMinor = "0";
  -    version = "${versionMajor}.${versionMinor}";
   
     src = fetchurl {
       url = "http://launchpad.net/bzr/${versionMajor}/${version}/+download/"
  
positive.code: , buildPythonPackage
  , fetchTritonPatch
  , fetchurl
  , pythonPackages
  
  , paramiko
  , pycurl
  
negative.code: 
    disabled = isPy3k;
  
    meta = with lib; {
      description = "Bazaar is a distributed version control system";
      homepage = http://bazaar-vcs.org/;
      license = licenses.gpl2;
  