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

Calculating dependencies ... done!
Dependency resolution took 0.85 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=app-text/calibre-8.15.0" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-text/calibre-8.15.0::gentoo (masked by: package.mask)
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Eli Schwartz <eschwartz@gentoo.org> (2025-12-15)
# This version has lit a firecracker under the community and attracted
# some ire. The situation is in a state of mild flux, and more generally
# requires further consideration to determine the correct course of
# action. Use at your own risk. See bug #969475.


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