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 "=app-arch/p7zip-17.05-r2" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-arch/p7zip-17.05-r2::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Sam James <sam@gentoo.org> (2026-07-16)
# Outdated and replaced by app-arch/7zip. Many unfixed bugs including
# severe vulnerabilities.
# Removal on 2026-08-15.  Bug #942397.


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