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-boot/shim-16.1_p8" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-boot/shim-16.1_p8::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Nowa Ammerlaan <nowa@gentoo.org> (2026-08-06)
# This version was pulled from upstream. The reason for this is
# unclear. But masked just as a precaution. Bug #980367.


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