intel-beignet : The Beignet GPGPU System for Intel Ivybridge GPUs ( http://wiki.freedesktop.org/www/Software/Beignet/ )
libspotify : C API package to utilize the Spotify music streaming service ( https://developer.spotify.com/technologies/libspotify/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a mrueg
For Paludis use this rsync : rsync://gentoo.zugaina.org/mrueg-portage
If you have a problem : ycarus(-at-)zugaina.org