/usr/lib/ocaml/pxp-engine/META is in libpxp-ocaml-dev 1.2.2-1build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | description = "Polymorphic XML Parser"
version = "1.2.2"
requires = "netstring"
archive(byte) = "pxp_engine.cma"
archive(byte,toploop) = "pxp_engine.cma pxp_top.cmo"
archive(native) = "pxp_engine.cmxa"
|