Created attachment 418752 [details]
Ebuild depending on wireless-tools
x11-plugins/vicious provides a wifi widget which uses iwconfig to get its data. Without iwconfig it returns 0 instead of erring.
In the source can be seen iwconfig is used: http://git.sysphere.org/vicious/tree/widgets/wifi.lua
Instead of always depending on wireless-tools, the ebuild could implement the useflag "wifi" which, when disabled, would remove "wifi.lua" and not depend on wireless-tools.