These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.82 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=sys-firmware/b43-firmware-6.30.163.46" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-firmware/b43-firmware-6.30.163.46::gentoo (masked by: Broadcom license(s), missing keyword)
A copy of the 'Broadcom' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/Broadcom'.


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