No distributions at all found for flexget

# pip install flexget
Downloading/unpacking flexget
  Could not find any downloads that satisfy the requirement flexget
No distributions at all found for flexget
Storing complete log in /root/.pip/pip.log

# cat /root/.pip/pip.log
------------------------------------------------------------
/usr/bin/pip run on Sat Mar 30 01:18:43 2013
Downloading/unpacking flexget

  Getting page http://pypi.python.org/simple/flexget
  URLs to search for versions for flexget:
  * http://pypi.python.org/simple/flexget/
  Getting page http://pypi.python.org/simple/flexget/
  Getting page http://flexget.com
  Could not fetch URL http://flexget.com (from http://pypi.python.org/simple/FlexGet/): <urlopen error [Errno -2] Name or service not known>
  Will skip URL http://flexget.com when looking for download links for flexget
  Getting page http://download.flexget.com/
  Could not fetch URL http://download.flexget.com/ (from http://pypi.python.org/simple/FlexGet/): <urlopen error [Errno -2] Name or service not known>
  Will skip URL http://download.flexget.com/ when looking for download links for flexget
  Analyzing links from page http://pypi.python.org/simple/FlexGet/
    Skipping link http://flexget.com (from http://pypi.python.org/simple/FlexGet/); not a file
    Skipping link http://download.flexget.com/ (from http://pypi.python.org/simple/FlexGet/); not a file
  Could not find any downloads that satisfy the requirement flexget

No distributions at all found for flexget

Exception information:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 104, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 245, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/usr/lib/python2.7/dist-packages/pip/req.py", line 978, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 157, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
DistributionNotFound: No distributions at all found for flexget