/usr/share/common-lisp/source/clsql/ is in cl-sql 6.7.0-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/source/clsql/clsql.asd
/usr/share/common-lisp/source/clsql/sql/
/usr/share/common-lisp/source/clsql/sql/ansi-loop.lisp
/usr/share/common-lisp/source/clsql/sql/base-classes.lisp
/usr/share/common-lisp/source/clsql/sql/cmucl-compat.lisp
/usr/share/common-lisp/source/clsql/sql/command-object.lisp
/usr/share/common-lisp/source/clsql/sql/conditions.lisp
/usr/share/common-lisp/source/clsql/sql/database.lisp
/usr/share/common-lisp/source/clsql/sql/db-interface.lisp
/usr/share/common-lisp/source/clsql/sql/decimals.lisp
/usr/share/common-lisp/source/clsql/sql/expressions.lisp
/usr/share/common-lisp/source/clsql/sql/fddl.lisp
/usr/share/common-lisp/source/clsql/sql/fdml.lisp
/usr/share/common-lisp/source/clsql/sql/generic-odbc.lisp
/usr/share/common-lisp/source/clsql/sql/generic-postgresql.lisp
/usr/share/common-lisp/source/clsql/sql/generics.lisp
/usr/share/common-lisp/source/clsql/sql/initialize.lisp
/usr/share/common-lisp/source/clsql/sql/kmr-mop.lisp
/usr/share/common-lisp/source/clsql/sql/loop-extension.lisp
/usr/share/common-lisp/source/clsql/sql/metaclasses.lisp
/usr/share/common-lisp/source/clsql/sql/ooddl.lisp
/usr/share/common-lisp/source/clsql/sql/oodml.lisp
/usr/share/common-lisp/source/clsql/sql/operations.lisp
/usr/share/common-lisp/source/clsql/sql/package.lisp
/usr/share/common-lisp/source/clsql/sql/pool.lisp
/usr/share/common-lisp/source/clsql/sql/recording.lisp
/usr/share/common-lisp/source/clsql/sql/sequences.lisp
/usr/share/common-lisp/source/clsql/sql/syntax.lisp
/usr/share/common-lisp/source/clsql/sql/time.lisp
/usr/share/common-lisp/source/clsql/sql/transaction.lisp
/usr/share/common-lisp/source/clsql/sql/utils.lisp