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

Calculating dependencies ... done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=app-emulation/virtualbox-kvm-7.2.16_pre20260201" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-emulation/virtualbox-kvm-7.2.16_pre20260201::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Viorel Munteanu <ceamac@gentoo.org> (2024-10-18)
# Experimental version, for testing purposes only.
# Bug #941566.


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