bzr: ERROR: No module named configobj

[Monty Taylor]

Installing latest bzr-builddeb packages (2.2) with latest bzr (2.1) produces this error when bzr help commands is run:

mordred@orisndriz03:~/src/drizzle/namespace-drizzle-protocol$ bzr help commands
bzr: ERROR: No module named configobj
You may need to install this Python library separately.

Thu 2010-03-04 10:39:29 -0800
0.048 bazaar version: 2.1.0
0.048 bzr arguments: [u'help', u'commands']
0.064 looking for plugins in /home/mordred/.bazaar/plugins
0.164 looking for plugins in /usr/lib/python2.5/site-packages/bzrlib/plugins
0.177 encoding stdout as sys.stdout encoding 'UTF-8'
0.233 Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 853, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1055, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 661, in run_argv_aliases
    return self.run_direct(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 665, in run_direct
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/cleanup.py", line 122, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/cleanup.py", line 156, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1070, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 4192, in run
    bzrlib.help.help(topic)
  File "/usr/lib/python2.5/site-packages/bzrlib/help.py", line 52, in help
    outfile.write(source.get_help_text(shadowed_terms))
  File "/usr/lib/python2.5/site-packages/bzrlib/help_topics/__init__.py", line 854, in get_help_text
    result = topic_registry.get_detail(self.topic)
  File "/usr/lib/python2.5/site-packages/bzrlib/help_topics/__init__.py", line 90, in get_detail
    return obj(topic)
  File "/usr/lib/python2.5/site-packages/bzrlib/help.py", line 78, in _help_commands_to_text
    shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
  File "/usr/lib/python2.5/site-packages/bzrlib/help.py", line 77, in <genexpr>
    commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 213, in get_cmd_object
    return _get_cmd_object(cmd_name, plugins_override)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 233, in _get_cmd_object
    cmd = hook(cmd, cmd_name)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 306, in _get_plugin_command
    return plugin_cmds.get(cmd_name)()
  File "/usr/lib/python2.5/site-packages/bzrlib/registry.py", line 173, in get
    return self._dict[self._get_key_or_default(key)].get_obj()
  File "/usr/lib/python2.5/site-packages/bzrlib/registry.py", line 61, in get_obj
    self._do_import()
  File "/usr/lib/python2.5/site-packages/bzrlib/registry.py", line 70, in _do_import
    obj = __import__(self._module_name, globals(), locals(), names)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/builddeb/cmds.py", line 60, in <module>
    from bzrlib.plugins.builddeb.config import DebBuildConfig
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/builddeb/config.py", line 23, in <module>
    from bzrlib.util.configobj.configobj import ParseError
ImportError: No module named configobj