https://lists.debian.org/debian-ocaml-maint/2020/03/msg00111.html
ocaml-ptmap is marked for autoremoval from testing
ocamlmarkedtesting
https://archlinux.org/packages/extra/x86_64/ocaml-ptmap/files/
Arch Linux - ocaml-ptmap 2.0.5-4 (x86_64) - File List
arch linux