I don't like exceptions. So I'm not for "hiding" it. I must admit I think the same about it though. At some point we'll have openbsd-ports archlinux-pkgbuilds, alpine-aports, void-srcpkg, freebsd-ports, pkgsrc-ports, .... It will cluter the view for no reason.

I'd go for something less generic than "contrib" though. Something like "packing" or "multi-ports"