Erro instalação gentoo "emerge -u world"

Seguindo o guia do gentoo forums para instalação, ao executar o comando emerge -u world, recebi o seguinte erro:

!!! All ebuilds that could satisfy ">=sys-libs/e2fsprogs-libs-1.41" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-libs/e2fsprogs-libs-1.41.4 (masked by: EAPI 2)
- sys-libs/e2fsprogs-libs-1.41.3-r1 (masked by: EAPI 2)

The current version of portage supports EAPI '1'. You must upgrade to a
newer version of portage before EAPI masked packages can be installed.

For more information, see MASKED PACKAGES section in the emerge man page or
refer to the Gentoo Handbook.
(dependency required by "sys-apps/util-linux-2.14.1" [ebuild])



!!! Problem resolving dependencies for sys-apps/util-linux
!!! Depgraph creation failed.

Pesquisei no google pelo erro e encontrei um kra dizendo que devia ser executado o comando:

emerge portage

Funcionou!

depois que terminarem os procedimentos do "emerge portage" é só digitar novamente o emerge -u world e tudo segue em frente.

;)