Traceback (most recent call last):
  File "/usr/lib/ckan/default/bin/paster", line 7, in <module>
    from paste.script.command import run
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 3, in <module>
    import pkg_resources
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 22, in <module>
    import io
  File "/usr/lib/python2.7/io.py", line 51, in <module>
    import _io
ImportError: No module named _io