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

Calculating dependencies ... done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=dev-embedded/rpi-eeprom-28.28" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-embedded/rpi-eeprom-28.28::gentoo (masked by: rpi-eeprom license(s), missing keyword)
A copy of the 'rpi-eeprom' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/rpi-eeprom'.


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