Actually, I stumbled upon the same problem and haven't found time to either try to solve it or ask (elsewhere then on #gentoo@irc.freenode.net, where I got no anwer).
I suspect it's a bug, because it worked the first time just fine, but the next day when I ran 'emerge-sync' I lost the possibility to 'eix' in installed overlays. So far I'm stumped. I hope we soon find a solution...
I have the same problem
Actually, I stumbled upon the same problem and haven't found time to either try to solve it or ask (elsewhere then on #gentoo@irc.freenode.net, where I got no anwer).
I suspect it's a bug, because it worked the first time just fine, but the next day when I ran 'emerge-sync' I lost the possibility to 'eix' in installed overlays. So far I'm stumped. I hope we soon find a solution...