wpa_supplicant.service contains this: [Service] Type=dbus BusName=fi.epitest.hostap.WPASupplicant ExecStart=@BINDIR@/wpa_supplicant -u Attempting to start this service when USE="-dbus" will result in a error/usage message being output to the journal since the "-u" option is not valid.
Created attachment 395428 [details, diff] ebuild patch
+*wpa_supplicant-2.3-r2 (04 Feb 2015) + + 04 Feb 2015; Mike Gilbert <floppym@gentoo.org> +wpa_supplicant-2.3-r2.ebuild: + Exclude wpa_supplicant.service when USE=-dbus, bug 538600.