actionpack-action_caching : Action caching for Action Pack (removed from core in Rails 4.0) ( https://github.com/rails/actionpack-action_caching )
awesome_nested_set : An awesome nested set implementation for Active Record ( https://github.com/collectiveidea/awesome_nested_set )
request_store : Per-request global storage for Rack ( https://github.com/steveklabnik/request_store )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a hacking-gentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/hacking-gentoo-portage
If you have a problem : ycarus(-at-)zugaina.org