localhost khronus # emerge layman
Calculating dependencies   
!!! All ebuilds that could satisfy "layman" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-portage/layman-1.0.0 (masked by: ~amd64 keyword)
- app-portage/layman-1.0.6 (masked by: ~amd64 keyword)
- app-portage/layman-1.0.4 (masked by: ~amd64 keyword)

For more information, see MASKED PACKAGES section in the emerge man page or 
refer to the Gentoo Handbook.