Freeze/extract barf on newstyle (grouped) standalones

Pretty much a demonstration that testing the glue code is useful, too.
Here's the traceback that on gets performing the freeze :

Traceback (most recent call last):
    if not allow_local_modification and repo.uncommitted_changes():
  File "..../anybox/recipe/openerp/vcs/git.py", line 164, in uncommitted_changes
    os.chdir(self.target_dir)
OSError: [Errno 2] No such file or directory: '/path/to/buildout/thestandalone'

I did not even try an extract (it starts with a freeze anyway)