Comment 4 for bug 983981

I changed DEFAULT_VERSION to (2, 6) and upgrade failed again.

Here is the output with PYCOMPILE_DEBUG=1:
"""
Setting up python2.7-minimal (2.7.3-0ubuntu1) ...
DEBUG:pycompile:argv: ['/usr/bin/pycompile', '-V', '2.7', '/usr/lib/python2.7/dist-packages']
DEBUG:pycompile:options: {'regexpr': None, 'version_range': ((2, 7), (2, 7)), 'pyr_mode': False, 'verbose': True, 'package': None}
DEBUG:pycompile:args: ['/usr/lib/python2.7/dist-packages']
DEBUG:pycompile:requested versions: set([])
ERROR:pycompile:Requested versions are not installed
dpkg: error processing python2.7-minimal (--configure):
 subprocess installed post-installation script returned error exit status 3
"""