The RDEPEND information in the ebuild refers to media-sound/pulseaudio-1.0 which is not in the tree anymore. The logical or with the two USE flags avahi and zeroconf does not work anymore. Reproducible: Always Steps to Reproduce: emerge -auvDN world on a system with pasystray installed or install pasystray on a system that does have pulseaudio-5 installed Actual Results: the update will not enforce pulseaudio-5 to be installed with the zeroconf USE flag an error message will be displayed because the RDEPEND can not be resolved Expected Results: the update/install should install pulseaudio-5 with USE=zeroconf --- /usr/portage/media-sound/pasystray/pasystray-0.2.1.ebuild 2014-10-12 19:31:13.000000000 +0200 +++ /usr/local/portage_mine/media-sound/pasystray/pasystray-0.2.1-r1.ebuild 2015-03-19 21:04:48.515857171 +0100 @@ -15,7 +15,7 @@ IUSE="libnotify" RDEPEND=" - || ( >=media-sound/pulseaudio-1.0[glib,avahi] >=media-sound/pulseaudio-5.0-r3[glib,zeroconf] ) + >=media-sound/pulseaudio-5.0-r3[glib,zeroconf] >=net-dns/avahi-0.6 x11-libs/gtk+:3 x11-libs/libX11