/usr/lib/python2.7/dist-packages/Pyste-0.9.10.egg-info is in libboost-python1.58-dev 1.58.0+dfsg-5ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/Pyste-0.9.10-py2.7.egg-info