The thread_safe package requires atomic and so it should have atomic as a runtime dependency. Reproducible: Always Steps to Reproduce: 1. emerge thread_safe 2. run ruby program that requires thread_safe Actual Results: kaboom! Expected Results: things should just work I've got a local ebuild that adds a simple line: ruby_add_rdepend "dev-ruby/atomic" That fixes the problem for me. I'm skipping attaching said ebuild since it is such a small change to the ebuild
02 Aug 2013; Manuel Rüger <mrueg@gentoo.org> -thread_safe-0.1.0.ebuild, thread_safe-0.1.2.ebuild: Add missing dep, thanks to Jonathan Geisler. Fixes bug #479336. Cleanup.