setuptools_bzr does not work with looms

writing dependency_links to launchpadlib.egg-info/dependency_links.txt
Traceback (most recent call last):
  File "setup.py", line 32, in ?
    setup_requires = [
  File "/usr/lib/python2.4/distutils/core.py", line 149, in setup
    dist.run_commands()
  File "/usr/lib/python2.4/distutils/dist.py", line 946, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python2.4/distutils/dist.py", line 966, in run_command
    cmd_obj.run()
  File "/usr/lib/python2.4/site-packages/setuptools/command/develop.py", line 27, in run
    self.install_for_development()
  File "/usr/lib/python2.4/site-packages/setuptools/command/develop.py", line 85, in install_for_development
    self.run_command('egg_info')
  File "/usr/lib/python2.4/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/usr/lib/python2.4/distutils/dist.py", line 966, in run_command
    cmd_obj.run()
  File "/usr/lib/python2.4/site-packages/setuptools/command/egg_info.py", line 171, in run
    self.find_sources()
  File "/usr/lib/python2.4/site-packages/setuptools/command/egg_info.py", line 252, in find_sources
    mm.run()
  File "/usr/lib/python2.4/site-packages/setuptools/command/egg_info.py", line 306, in run
    self.add_defaults()
  File "/usr/lib/python2.4/site-packages/setuptools/command/egg_info.py", line 333, in add_defaults
    rcfiles = list(walk_revctrl())
  File "/usr/lib/python2.4/site-packages/setuptools/command/sdist.py", line 45, in walk_revctrl
    for item in ep.load()(dirname):
  File "/usr/lib/python2.4/site-packages/PIL/__init__.py", line 83, in find_files_for_bzr

  File "/usr/lib/python2.4/site-packages/PIL/__init__.py", line 55, in bzrlib_find_files_for_bzr

  File "/usr/lib/python2.4/site-packages/PIL/__init__.py", line 39, in bzrlib_get_children

  File "/usr/lib/python2.4/site-packages/bzrlib/branch.py", line 130, in open_containing
    return control.open_branch(), relpath
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 1369, in open_branch
    format = self.find_branch_format()
  File "/usr/lib/python2.4/site-packages/bzrlib/bzrdir.py", line 1279, in find_branch_format
    return BranchFormat.find_format(self)
  File "/usr/lib/python2.4/site-packages/bzrlib/branch.py", line 842, in find_format
    raise errors.UnknownFormatError(format=format_string, kind='branch')
bzrlib.errors.UnknownFormatError: Unknown branch format: 'Bazaar-NG Loom branch format 6\n'