emerge: there are no ebuilds built with USE flags to satisfy "dev-lang/python[xml]".
!!! One of the following packages is required to complete your request:
- dev-lang/python-2.6.4 (Change USE: +xml)
(dependency required by "app-portage/gentoolkit-0.2.4.5" [ebuild])
(dependency required by "gentoolkit" [argument])
The error tells you how to resolve this one "Change USE +xml" Basically you just need to update /etc/portage/package.use and add python with an xml flag.
