/usr/share/acl2-6.3/books/make-event/ is in acl2-books-certs 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/make-event/acl2x-help-test.cert
/usr/share/acl2-6.3/books/make-event/acl2x-help.cert
/usr/share/acl2-6.3/books/make-event/assert-check-include-1.cert
/usr/share/acl2-6.3/books/make-event/assert-check-include.cert
/usr/share/acl2-6.3/books/make-event/assert-check.cert
/usr/share/acl2-6.3/books/make-event/assert-include.cert
/usr/share/acl2-6.3/books/make-event/basic-check.cert
/usr/share/acl2-6.3/books/make-event/basic-pkg-check.cert
/usr/share/acl2-6.3/books/make-event/basic-pkg.cert
/usr/share/acl2-6.3/books/make-event/basic.cert
/usr/share/acl2-6.3/books/make-event/defconst-fast-examples.cert
/usr/share/acl2-6.3/books/make-event/defconst-fast.cert
/usr/share/acl2-6.3/books/make-event/defrefine.cert
/usr/share/acl2-6.3/books/make-event/defrule.cert
/usr/share/acl2-6.3/books/make-event/defspec.cert
/usr/share/acl2-6.3/books/make-event/dotimes.cert
/usr/share/acl2-6.3/books/make-event/double-cert-test-1.cert
/usr/share/acl2-6.3/books/make-event/double-cert-test.cert
/usr/share/acl2-6.3/books/make-event/embeddable-event-forms.cert
/usr/share/acl2-6.3/books/make-event/eval-check-tests.cert
/usr/share/acl2-6.3/books/make-event/eval-check.cert
/usr/share/acl2-6.3/books/make-event/eval-tests.cert
/usr/share/acl2-6.3/books/make-event/gen-defthm-check.cert
/usr/share/acl2-6.3/books/make-event/gen-defthm.cert
/usr/share/acl2-6.3/books/make-event/gen-defun-check.cert
/usr/share/acl2-6.3/books/make-event/gen-defun.cert
/usr/share/acl2-6.3/books/make-event/inline-book.cert
/usr/share/acl2-6.3/books/make-event/local-elided-include.cert
/usr/share/acl2-6.3/books/make-event/local-elided.cert
/usr/share/acl2-6.3/books/make-event/local-requires-skip-check-include.cert
/usr/share/acl2-6.3/books/make-event/local-requires-skip-check.cert
/usr/share/acl2-6.3/books/make-event/logical-tangent.cert
/usr/share/acl2-6.3/books/make-event/macros-include.cert
/usr/share/acl2-6.3/books/make-event/macros-skip-proofs-include.cert
/usr/share/acl2-6.3/books/make-event/macros-skip-proofs.cert
/usr/share/acl2-6.3/books/make-event/macros.cert
/usr/share/acl2-6.3/books/make-event/make-event-keywords-or-exp-check.cert
/usr/share/acl2-6.3/books/make-event/make-event-keywords-or-exp.cert
/usr/share/acl2-6.3/books/make-event/make-redundant.cert
/usr/share/acl2-6.3/books/make-event/nested-check.cert
/usr/share/acl2-6.3/books/make-event/nested.cert
/usr/share/acl2-6.3/books/make-event/portcullis-expansion-include.cert
/usr/share/acl2-6.3/books/make-event/portcullis-expansion.cert
/usr/share/acl2-6.3/books/make-event/proof-by-arith.cert
/usr/share/acl2-6.3/books/make-event/read-from-file.cert
/usr/share/acl2-6.3/books/make-event/require-book.cert
/usr/share/acl2-6.3/books/make-event/stobj-test.cert
/usr/share/acl2-6.3/books/make-event/test-case-check.cert
/usr/share/acl2-6.3/books/make-event/test-case.cert