Traceback (most recent call last):
  File "setup.py", line 37, in <module>
    'Topic :: Software Development :: Libraries :: Python Modules',
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "build/bdist.linux-i686/egg/setuptools/command/install.py", line 76, in run
  File "build/bdist.linux-i686/egg/setuptools/command/install.py", line 104, in do_egg_install
  File "build/bdist.linux-i686/egg/setuptools/command/easy_install.py", line 211, in run

  File "build/bdist.linux-i686/egg/setuptools/command/easy_install.py", line 427, in easy_install

  File "build/bdist.linux-i686/egg/setuptools/command/easy_install.py", line 478, in install_item

  File "build/bdist.linux-i686/egg/setuptools/command/easy_install.py", line 519, in process_distribution

  File "build/bdist.linux-i686/egg/pkg_resources.py", line 563, in resolve
    distributions, errors = working_set.find_plugins(
  File "build/bdist.linux-i686/egg/pkg_resources.py", line 799, in best_match

  File "build/bdist.linux-i686/egg/pkg_resources.py", line 811, in obtain
    raise TypeError("Can't add %r to environment" % (other,))
  File "build/bdist.linux-i686/egg/setuptools/command/easy_install.py", line 434, in easy_install

  File "build/bdist.linux-i686/egg/setuptools/package_index.py", line 475, in fetch_distribution
AttributeError: 'NoneType' object has no attribute 'clone'