/usr/share/common-lisp/source/trivial-features/ is in cl-trivial-features 0.6-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/common-lisp/source/trivial-features/src/
/usr/share/common-lisp/source/trivial-features/src/tf-abcl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-allegro.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-clisp.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-cmucl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-corman.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-ecl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-lispworks.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-openmcl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-sbcl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-scl.lisp
/usr/share/common-lisp/source/trivial-features/src/tf-xcl.lisp
/usr/share/common-lisp/source/trivial-features/tests/
/usr/share/common-lisp/source/trivial-features/tests/package.lisp
/usr/share/common-lisp/source/trivial-features/tests/sysinfo.lisp
/usr/share/common-lisp/source/trivial-features/tests/tests.lisp
/usr/share/common-lisp/source/trivial-features/tests/utsname.lisp
/usr/share/common-lisp/source/trivial-features/trivial-features-tests.asd
/usr/share/common-lisp/source/trivial-features/trivial-features.asd