setuptools/distutils/distribute failing miserably

requirements.txt

```
PyYAML>=3.09,<4.0
boto>=2.5.0,<2.6
requests==1.1.0-knewton
kerberos>=1.1.1
requests-kerberos>=0.1-knewton,<0.2
```

the_run

```
(k.aws)681 pn@PN-mac 20:21 ~/dvcs/lib/python/k.aws $ pip install --index-url=http://pypi.knewton.net/simple kerberos==1.1.1
(k.aws)681 pn@PN-mac 20:22 ~/dvcs/lib/python/k.aws $ pip install --index-url=http://pypi.knewton.net/simple -r config/requirements.external.txt
Requirement already satisfied (use --upgrade to upgrade): PyYAML>=3.09,<4.0 in /Users/pn/lib/python2.6/site-packages (from -r config/requirements.external.txt (line 1))
Requirement already satisfied (use --upgrade to upgrade): boto>=2.5.0,<2.6 in /private/tmp/k.aws/lib/python2.6/site-packages/boto-2.5.2-py2.6.egg (from -r config/requirements.external.txt (line 2))
Downloading/unpacking requests==1.1.0-knewton (from -r config/requirements.external.txt (line 3))
  Running setup.py egg_info for package requests
Downloading/unpacking kerberos>=1.1.1 (from -r config/requirements.external.txt (line 4))
  Running setup.py egg_info for package kerberos
Downloading/unpacking requests-kerberos>=0.1-knewton,<0.2 (from -r config/requirements.external.txt (line 5))
  Running setup.py egg_info for package requests-kerberos
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
      File "/tmp/k.aws/build/requests-kerberos/setup.py", line 6, in <module>
        import requests_kerberos
      File "requests_kerberos/__init__.py", line 15, in <module>
        from .kerberos_ import HTTPKerberosAuth, REQUIRED, OPTIONAL, DISABLED
      File "requests_kerberos/kerberos_.py", line 1, in <module>
        import kerberos
    ImportError: No module named kerberos
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 16, in <module>

  File "/tmp/k.aws/build/requests-kerberos/setup.py", line 6, in <module>

    import requests_kerberos

  File "requests_kerberos/__init__.py", line 15, in <module>

    from .kerberos_ import HTTPKerberosAuth, REQUIRED, OPTIONAL, DISABLED

  File "requests_kerberos/kerberos_.py", line 1, in <module>

    import kerberos

ImportError: No module named kerberos

----------------------------------------
Command python setup.py egg_info failed with error code 1 in /tmp/k.aws/build/requests-kerberos
Storing complete log in /Users/pn/.pip/pip.log
```