The existing ebuild have problem with tun/tap device.
Created attachment 2414 [details] usermode-20020604.ebuild The current ebuild have problems with tup/tap device.
...see bug #6110... To g2boojum: I didnt change the ebuilds because they are not mine. Shall I? May I? You want to do it?
Please be sure before changing is the version of user-mode tools you choice work with tun/tap device. For the version I suggested I'm sure, because I'm using it for my UML networking. Some of the last uml-tools versions also have such kind of problems. So please check before to choice an ebuild.
Already fixed i think.