/usr/share/acl2-6.3/books/translators/ is in acl2-books-source 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/translators/l3-to-acl2/
/usr/share/acl2-6.3/books/translators/l3-to-acl2-deps.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/mips/
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/mips/mips.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/gold/
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/gold/tiny-logic.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/gold/tiny.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/run.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/examples/thacker/tiny-manual.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/target.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/translator/
/usr/share/acl2-6.3/books/translators/l3-to-acl2/translator/l3-to-acl2.lisp
/usr/share/acl2-6.3/books/translators/l3-to-acl2/translator/l3.lisp