/usr/share/common-lisp/source/ is in cl-ppcre 2.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/source/cl-ppcre/
/usr/share/common-lisp/source/cl-ppcre/api.lisp
/usr/share/common-lisp/source/cl-ppcre/charmap.lisp
/usr/share/common-lisp/source/cl-ppcre/charset.lisp
/usr/share/common-lisp/source/cl-ppcre/chartest.lisp
/usr/share/common-lisp/source/cl-ppcre/cl-ppcre-unicode.asd
/usr/share/common-lisp/source/cl-ppcre/cl-ppcre.asd
/usr/share/common-lisp/source/cl-ppcre/closures.lisp
/usr/share/common-lisp/source/cl-ppcre/convert.lisp
/usr/share/common-lisp/source/cl-ppcre/errors.lisp
/usr/share/common-lisp/source/cl-ppcre/lexer.lisp
/usr/share/common-lisp/source/cl-ppcre/optimize.lisp
/usr/share/common-lisp/source/cl-ppcre/packages.lisp
/usr/share/common-lisp/source/cl-ppcre/parser.lisp
/usr/share/common-lisp/source/cl-ppcre/regex-class-util.lisp
/usr/share/common-lisp/source/cl-ppcre/regex-class.lisp
/usr/share/common-lisp/source/cl-ppcre/repetition-closures.lisp
/usr/share/common-lisp/source/cl-ppcre/scanner.lisp
/usr/share/common-lisp/source/cl-ppcre/specials.lisp
/usr/share/common-lisp/source/cl-ppcre/util.lisp