/usr/lib/python2.7/dist-packages/zope.preference-3.8.0.egg-info/requires.txt is in python-zope.preference 3.8.0-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope.preference-3.8.0.egg-info/../../../../share/pyshared/zope.preference-3.8.0.egg-info/requires.txt