prerm is in ocaml-base-nox 4.01.0-3ubuntu3.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/sh
set -e
rmdir /usr/local/lib/ocaml/4.01.0/stublibs 2>/dev/null || true
rmdir /usr/local/lib/ocaml/4.01.0 2>/dev/null || true
rmdir /usr/local/lib/ocaml 2>/dev/null || true
|