setup.py executing always trying "copy_tree"

The setup.py always call "copy_tree("TextFlow/languages", "/usr/share/textflow/languages")"

But this is wrong, you can do this:

python setup.py --help

To show setup.py options and helps, but with "copy_tree" in this way, always trying to do the copy ...

To reproduce the error, execute as normal user (not a root), this command:
python setup.py --help

copying TextFlow/languages/python/config.py -> /usr/share/textflow/languages/python
Traceback (most recent call last):
  File "setup.py", line 36, in <module>
    copy_tree("TextFlow/languages", "/usr/share/textflow/languages")
  File "/usr/lib/python2.5/distutils/dir_util.py", line 172, in copy_tree
    dry_run=dry_run))
  File "/usr/lib/python2.5/distutils/dir_util.py", line 175, in copy_tree
    preserve_times, update, dry_run=dry_run)
  File "/usr/lib/python2.5/distutils/file_util.py", line 165, in copy_file
    _copy_file_contents(src, dst)
  File "/usr/lib/python2.5/distutils/file_util.py", line 44, in _copy_file_contents
    "could not delete '%s': %s" % (dst, errstr)
distutils.errors.DistutilsFileError: could not delete '/usr/share/textflow/languages/python/config.py': Permission denied