Mine

localhost angel # emerge net-wireless/rtl8187 1.10
Calculating dependencies -
!!! All ebuilds that could satisfy "net-wireless/rtl8187" have been masked.
!!! One of the following masked packages is required to complete your request:
- net-wireless/rtl8187-1.10 (masked by: missing keyword)

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