pkg_add: no pkg found for 'osabi-NetBSD-9.0', sorry.
pkg_add: Can't install dependency osabi-NetBSD-9.0
pkg_add: package `giflib-5.2.1nb4' was already installed as dependency, now marked as installed manually
pkg_add: 1 package addition failed
===========================================================================
$NetBSD: MESSAGE,v 1.1 2020/03/15 15:26:22 taca Exp $

Note that this is a minimal package.

The original ruby-2.7.1 distribution includes more extension
libraries, some of which are provided as separate packages:

	databases/ruby-gdbm:		GDBM module
	devel/ruby-fiddle:		Fiddle module
	devel/ruby-readline:		readline module

===========================================================================