/usr/share/common-lisp/systems/esrap.asd is in cl-esrap 20151218-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/common-lisp/systems/../source/esrap/esrap.asd
/usr/share/common-lisp/systems/../source/esrap/esrap.asd