Ho un problema con emerge world di gentoo

[Alkaid]

volevo aggiornare dopo un bel po che non lo facevo ma mi da questo errore:
tux loris # emerge -up --deep world

These are the packages that I would merge, in order:

Calculating world dependencies -
!!! All ebuilds that could satisfy "app-admin/eselect-opengl" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-admin/eselect-opengl-1.0.2-r1 (masked by: ~x86 keyword)
- app-admin/eselect-opengl-1.0.1 (masked by: ~x86 keyword)
- app-admin/eselect-opengl-1.0.2 (masked by: ~x86 keyword)

For more information, see MASKED PACKAGES section in the emerge man page or
section 2.2 "Software Availability" in the Gentoo Handbook.
!!! (dependency required by "x11-base/opengl-update-3.0.0" [ebuild])


!!! Problem with ebuild media-sound/xmms-1.2.10-r15
!!! Possibly a DEPEND/*DEPEND problem.

!!! Depgraph creation failed.
tux loris #


capisco che devo smascherare dei pacchetti, giusto? e quale sarebbe il file ove devo apportare tale modifica?
grazie

[GhePeU]

/etc/portage/package.keywords


se non c'è crealo e inseriscici dentro "app-admin/eselect-opengl ~x86"

[Alkaid]

grazie mille