/usr/share/common-lisp/ is in cl-acl-compat 1.2.42+cvs.2010.02.08-dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/source/
/usr/share/common-lisp/source/cl-acl-compat/
/usr/share/common-lisp/source/cl-acl-compat/acl-compat-common-lisp-lw.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-compat-corman.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-compat.asd
/usr/share/common-lisp/source/cl-acl-compat/acl-excl-common.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-excl-corman.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-mp-corman.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-mp-package.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-socket-corman.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-ssl-streams.lisp
/usr/share/common-lisp/source/cl-acl-compat/acl-ssl.lisp
/usr/share/common-lisp/source/cl-acl-compat/allegro/
/usr/share/common-lisp/source/cl-acl-compat/allegro/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/allegro/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/allegro/acl-socket.lisp
/usr/share/common-lisp/source/cl-acl-compat/allegro/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/chunked-stream-mixin.lisp
/usr/share/common-lisp/source/cl-acl-compat/chunked.lisp
/usr/share/common-lisp/source/cl-acl-compat/clisp/
/usr/share/common-lisp/source/cl-acl-compat/clisp/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/clisp/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/clisp/acl-socket.lisp
/usr/share/common-lisp/source/cl-acl-compat/clisp/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/cmucl/
/usr/share/common-lisp/source/cl-acl-compat/cmucl/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/cmucl/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/cmucl/acl-socket.lisp
/usr/share/common-lisp/source/cl-acl-compat/cmucl/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/defsys.lisp
/usr/share/common-lisp/source/cl-acl-compat/lispworks/
/usr/share/common-lisp/source/cl-acl-compat/lispworks/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/lispworks/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/lispworks/acl-socket.lisp
/usr/share/common-lisp/source/cl-acl-compat/lispworks/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/lw-buffering.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/
/usr/share/common-lisp/source/cl-acl-compat/mcl/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/acl-socket-mcl.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/acl-socket-openmcl.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/mcl-stream-fix.lisp
/usr/share/common-lisp/source/cl-acl-compat/mcl/mcl-timers.lisp
/usr/share/common-lisp/source/cl-acl-compat/packages.lisp
/usr/share/common-lisp/source/cl-acl-compat/sbcl/
/usr/share/common-lisp/source/cl-acl-compat/sbcl/acl-excl.lisp
/usr/share/common-lisp/source/cl-acl-compat/sbcl/acl-mp.lisp
/usr/share/common-lisp/source/cl-acl-compat/sbcl/acl-socket.lisp
/usr/share/common-lisp/source/cl-acl-compat/sbcl/acl-sys.lisp
/usr/share/common-lisp/source/cl-acl-compat/test-acl-socket.lisp
/usr/share/common-lisp/systems/
/usr/share/common-lisp/systems/acl-compat.asd