/usr/share/common-lisp/systems/reversi.asd is in cl-reversi 1.0.14-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/common-lisp/systems/../source/reversi/reversi.asd
/usr/share/common-lisp/systems/../source/reversi/reversi.asd