[BangPypers] missing dependency while installing virtualenvwrapper on ubuntu-12.04

[vid]

An upgrade to ubuntu 12.04 gives this error:

$ sudo pip install virtualenvwrapper
Traceback (most recent call last):
  File "/usr/local/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2711,
in <module>
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 584, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: pip==1.1

Is it a missing (or just not versioned) dependency or packaging error?

TIA.

Regards,
Vid
॥ http://svaksha.com ॥