/usr/lib/python2.7/dist-packages/Pyste-0.9.10.egg-info is in libboost-python1.62-dev 1.62.0+dfsg-4.
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