/usr/share/common-lisp/source/ is in cl-postgres 20170403-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/common-lisp/source/cl-postgres/
/usr/share/common-lisp/source/cl-postgres/cl-postgres/
/usr/share/common-lisp/source/cl-postgres/cl-postgres.asd
/usr/share/common-lisp/source/cl-postgres/cl-postgres/bulk-copy.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/communicate.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/errors.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/features.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/ieee-floats.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/interpret.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/messages.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/oid.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/package.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/protocol.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/public.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/simple-date-tests.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/sql-string.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/strings-ascii.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/strings-utf-8.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/tests.lisp
/usr/share/common-lisp/source/cl-postgres/cl-postgres/trivial-utf-8.lisp