When building a custom made GNAP core, it fails to expand elibc_uclibc and possible others during livecd-stage2.
The GNAP project has been discontinued, its removal was acknowledged by steev. If you need to, you can contact the Gentoo Embedded project; more information about the Gentoo Embedded project can be found on the following link: http://www.gentoo.org/proj/en/base/embedded/ This removal happens as part of project cleanup by the Gentoo Council's members.