KEYWORDS.dropped 1 xfce-extra/xfce4-mixer/xfce4-mixer-4.9.0.ebuild: alpha arm hppa ia64 ppc ppc64 sparc because of dev-libs/keybinder, and ensure you keyword both slot's of keybinder...
alternatively you can drop keywords since xfce4-mixer is gstreamer based mixer, thus a bit heavy, and media-sound/ is full of replacements which use pure alsa, oss... like media-sound/volwheel
Created attachment 326624 [details] xfce4-mixer-4.10.0.ebuild The new 4.10 version released a few days ago makes keybinder support optional. I'm attaching a modified 4.9 ebuild which reflects this.
~arm keyword restored.
keyword ~ppc ~ppc64
Marked ~hppa.
This is extra package which is not required at all, there are plenty of more lightweight system tray mixers in tree. Dropped the old copy from tree.