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

Calculating dependencies ... done!
Dependency resolution took 0.83 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=games-arcade/thinktanks-demo-1.1-r4" have been masked.
!!! One of the following masked packages is required to complete your request:
- games-arcade/thinktanks-demo-1.1-r4::gentoo (masked by: package.mask, THINKTANKS license(s))
/Volumes/Disk 1/Repository/portage-git/profiles/arch/amd64/no-multilib/package.mask:
# AMD64 Team <amd64@gentoo.org>
# Mask packages that rely on amd64 multilib

A copy of the 'THINKTANKS' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/THINKTANKS'.


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