/usr/share/common-lisp/systems/cl-unicode.asd is in cl-unicode 0.1.5-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/common-lisp/systems/../source/cl-unicode/cl-unicode.asd
/usr/share/common-lisp/systems/../source/cl-unicode/cl-unicode.asd