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 "=gnome-base/librsvg-2.40.21-r1" have been masked.
!!! One of the following masked packages is required to complete your request:
- gnome-base/librsvg-2.40.21-r1::gentoo (masked by: package.mask, missing keyword)
/Volumes/Disk 1/Repository/portage-git/profiles/base/package.mask:
# matoro <matoro_gentoo@matoro.tk> (2024-08-18)
# Pre-rust versions of librsvg.  Has vulnerabilities, so masked by
# default and only unmasked on wd40.


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