/usr/share/common-lisp/source/ is in cl-pgloader 3.1.0+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/source/pgloader/
/usr/share/common-lisp/source/pgloader/pgloader.lisp
/usr/share/common-lisp/source/pgloader/src/
/usr/share/common-lisp/source/pgloader/src/archive.lisp
/usr/share/common-lisp/source/pgloader/src/charsets.lisp
/usr/share/common-lisp/source/pgloader/src/hooks.lisp
/usr/share/common-lisp/source/pgloader/src/logs.lisp
/usr/share/common-lisp/source/pgloader/src/main.lisp
/usr/share/common-lisp/source/pgloader/src/monitor.lisp
/usr/share/common-lisp/source/pgloader/src/package.lisp
/usr/share/common-lisp/source/pgloader/src/params.lisp
/usr/share/common-lisp/source/pgloader/src/parse-ini.lisp
/usr/share/common-lisp/source/pgloader/src/parser.lisp
/usr/share/common-lisp/source/pgloader/src/pgsql/
/usr/share/common-lisp/source/pgloader/src/pgsql/copy-format.lisp
/usr/share/common-lisp/source/pgloader/src/pgsql/pgsql.lisp
/usr/share/common-lisp/source/pgloader/src/pgsql/queries.lisp
/usr/share/common-lisp/source/pgloader/src/pgsql/schema.lisp
/usr/share/common-lisp/source/pgloader/src/queue.lisp
/usr/share/common-lisp/source/pgloader/src/read-sql-files.lisp
/usr/share/common-lisp/source/pgloader/src/sources/
/usr/share/common-lisp/source/pgloader/src/sources/csv.lisp
/usr/share/common-lisp/source/pgloader/src/sources/db3.lisp
/usr/share/common-lisp/source/pgloader/src/sources/fixed.lisp
/usr/share/common-lisp/source/pgloader/src/sources/ixf.lisp
/usr/share/common-lisp/source/pgloader/src/sources/mysql-cast-rules.lisp
/usr/share/common-lisp/source/pgloader/src/sources/mysql-csv.lisp
/usr/share/common-lisp/source/pgloader/src/sources/mysql-schema.lisp
/usr/share/common-lisp/source/pgloader/src/sources/mysql.lisp
/usr/share/common-lisp/source/pgloader/src/sources/sources.lisp
/usr/share/common-lisp/source/pgloader/src/sources/sqlite.lisp
/usr/share/common-lisp/source/pgloader/src/sources/syslog.lisp
/usr/share/common-lisp/source/pgloader/src/transforms.lisp
/usr/share/common-lisp/source/pgloader/src/utils.lisp
/usr/share/common-lisp/source/simple-date/
/usr/share/common-lisp/source/simple-date/pgloader.asd