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 "=sys-fs/atari-fdisk-0.7.1.5.4-r1" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-fs/atari-fdisk-0.7.1.5.4-r1::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/arch/amd64/no-multilib/package.mask:
# James Le Cuirot <chewi@gentoo.org> (2021-09-04)
# This code assumes 32-bit longs and must therefore be built as a 32-bit binary.


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