python setup.py build
*** Installing xbook *** [66/74]

python setup.py install /home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build
Traceback (most recent call last):
  File "setup.py", line 21, in <module>
    bundlebuilder.start('Read')
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py", line 246, in start
    cmd_install(bundle_name, manifest, sys.argv[2])
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py", line 172, in cmd_install
    cmd_dist(bundle_name, manifest)
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py", line 159, in cmd_dist
    zipname = _get_package_name(bundle_name)
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundlebuilder.py", line 98, in _get_package_name
    bundle = Bundle(_get_source_path())
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundle.py", line 58, in __init__
    self._init_with_path(path)
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundle.py", line 76, in _init_with_path
    linfo_file = self._get_linfo_file()
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/site-packages/sugar/activity/bundle.py", line 161, in _get_linfo_file
    linfo_path = os.path.join(self.get_locale_path(), lang, 'activity.linfo')
  File "/home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build/lib/python2.5/posixpath.py", line 60, in join
    if b.startswith('/'):
AttributeError: 'NoneType' object has no attribute 'startswith'
*** error during stage install of xbook: ########## Error running python setup.py install /home/antoine/Projects/dev.laptop.org/sugar-jhbuild/build *** [66/74]