/usr/share/common-lisp/source/ is in cl-plus-ssl 20170630-1build1.
This file is owned by root:root, with mode 0o755.
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/usr/share/common-lisp/source/cl+ssl/
/usr/share/common-lisp/source/cl+ssl/cl+ssl.asd
/usr/share/common-lisp/source/cl+ssl/src/
/usr/share/common-lisp/source/cl+ssl/src/bio.lisp
/usr/share/common-lisp/source/cl+ssl/src/conditions.lisp
/usr/share/common-lisp/source/cl+ssl/src/context.lisp
/usr/share/common-lisp/source/cl+ssl/src/ffi-1.1.0.lisp
/usr/share/common-lisp/source/cl+ssl/src/ffi-buffer-all.lisp
/usr/share/common-lisp/source/cl+ssl/src/ffi-buffer-clisp.lisp
/usr/share/common-lisp/source/cl+ssl/src/ffi-buffer.lisp
/usr/share/common-lisp/source/cl+ssl/src/ffi.lisp
/usr/share/common-lisp/source/cl+ssl/src/package.lisp
/usr/share/common-lisp/source/cl+ssl/src/random.lisp
/usr/share/common-lisp/source/cl+ssl/src/reload.lisp
/usr/share/common-lisp/source/cl+ssl/src/streams.lisp