/var/lib/ocaml/ is in libfindlib-ocaml-dev 1.4.1-1.
This file is owned by root:root, with mode 0o755.
..
/var/lib/ocaml/lintian/
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.bigarray
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.camlp4
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.compiler-libs
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.dynlink
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.findlib
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.graphics
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.labltk
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.num
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.num-top
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.ocamlbuild
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.stdlib
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.str
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.threads
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.META.unix
/var/lib/ocaml/lintian/libfindlib-ocaml-dev.info
/var/lib/ocaml/md5sums/
/var/lib/ocaml/md5sums/libfindlib-ocaml-dev.md5sums