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 "=dev-build/cmake-9999" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-build/cmake-9999::gentoo (masked by: package.mask, missing keyword)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Sam James <sam@gentoo.org> (2026-09-08)
# Changes ctest(1) behaviour to exit non-zero if no tests, which
# may break many ebuilds. Needs some assessment.


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