Ошибки оболочки Virtualenv

Я только что установил virtualenv (с Python 2.7.2) на своем Mac, и я последовал за этим руководством: http://virtualenvwrapper.readthedocs.org/en/latest/install.html

Но теперь я получаю следующие ошибки, когда я запускаю свою оболочку каждый раз:

stevedore.extension Could not load 'user_scripts': distribute
stevedore.extension distribute
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 62, in __init__
    invoke_kwds,
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 74, in _load_one_plugin
    plugin = ep.load()
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1953, in load
    if require: self.require(env, installer)
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1966, in require
    working_set.resolve(self.dist.requires(self.extras),env,installer))
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
DistributionNotFound: distribute
stevedore.extension Could not load 'project': distribute
stevedore.extension distribute
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 62, in __init__
    invoke_kwds,
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 74, in _load_one_plugin
    plugin = ep.load()
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1953, in load
    if require: self.require(env, installer)
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1966, in require
    working_set.resolve(self.dist.requires(self.extras),env,installer))
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
DistributionNotFound: distribute
stevedore.extension Could not load 'user_scripts': distribute
stevedore.extension distribute
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 62, in __init__
    invoke_kwds,
  File "/Library/Python/2.7/site-packages/stevedore/extension.py", line 74, in _load_one_plugin
    plugin = ep.load()
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1953, in load
    if require: self.require(env, installer)
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 1966, in require
    working_set.resolve(self.dist.requires(self.extras),env,installer))
  File "/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
DistributionNotFound: distribute

Я не знаю, влияет ли это на эту проблему, но я использую ZSH.

Я попытался установить stevedore через pip (sudo pip install stevedore), но я получаю следующую ошибку:

sudo sh setuptools-0.6c11-py2.7.egg
Processing setuptools-0.6c11-py2.7.egg
removing '/Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg' (and everything under it)
Copying setuptools-0.6c11-py2.7.egg to /Library/Python/2.7/site-packages
setuptools 0.6c11 is already the active version in easy-install.pth
Installing easy_install script to /usr/local/bin
Installing easy_install-2.7 script to /usr/local/bin

Installed /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg
Processing dependencies for setuptools==0.6c11
Finished processing dependencies for setuptools==0.6c11
TXSLs-MacBook-Pro% sudo pip install stevedore --upgrade
Requirement already up-to-date: stevedore in /Library/Python/2.7/site-packages
Downloading/unpacking distribute (from stevedore)
  Running setup.py egg_info for package distribute

Installing collected packages: distribute
  Running setup.py install for distribute
    Before install bootstrap.
    Scanning installed packages
    Setuptools installation detected at /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg
    Egg installation
    Patching...
    Renaming /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg into /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg.OLD.1348764450.4
    Patched done.
    Relaunching...
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    NameError: name 'install' is not defined
    Complete output from command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build/distribute/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-FAPgYH-record/install-record.txt --single-version-externally-managed:
    Before install bootstrap.

Scanning installed packages

Setuptools installation detected at /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg

Egg installation

Patching...

Renaming /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg into /Library/Python/2.7/site-packages/setuptools-0.6c11-py2.7.egg.OLD.1348764450.4

Patched done.

Relaunching...

Traceback (most recent call last):

  File "<string>", line 1, in <module>

NameError: name 'install' is not defined

----------------------------------------
Command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build/distribute/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-FAPgYH-record/install-record.txt --single-version-externally-managed failed with error code 1 in /tmp/pip-build/distribute
Storing complete log in /Users/txsl/Library/Logs/pip.log

Я вручную установил setuptools, поскольку я не мог ничего установить через pip без него.

Что здесь не так, и как я могу это исправить? В Интернете, похоже, не так много случаев ошибки со стивидором. Я чувствую себя довольно застрявшим в данный момент!

Большое спасибо!