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 "=mail-mta/postfix-3.12_pre20260925" have been masked.
!!! One of the following masked packages is required to complete your request:
- mail-mta/postfix-3.12_pre20260925::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Eray Aslan <eras@gentoo.org> (2025-12-24)
# Mask experimental software


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