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

Calculating dependencies ... done!
Dependency resolution took 0.82 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=sys-libs/ncurses-6.6_p20260912" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-libs/ncurses-6.6_p20260912::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Sam James <sam@gentoo.org> (2026-04-17)
# app-misc/tmux fails to open with newer ncurses (bug #972804)


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