/usr/lib/python2.7/dist-packages/netifaces-0.6.egg-info/SOURCES.txt is in python-netifaces 0.6-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/netifaces-0.6.egg-info/../../../../share/pyshared/netifaces-0.6.egg-info/SOURCES.txt