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

Calculating dependencies ... done!
Dependency resolution took 0.85 s (backtrack: 1/20).


!!! All ebuilds that could satisfy "sci-electronics/labone" have been masked.
!!! One of the following masked packages is required to complete your request:
- sci-electronics/labone-23.02.42414::gentoo (masked by: zi-labone license(s))
A copy of the 'zi-labone' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/zi-labone'.

- sci-electronics/labone-21.08.20515-r2::gentoo (masked by: zi-labone license(s))

(dependency required by "dev-perl/Lab-Zhinst-2.40.0-r1::gentoo" [ebuild])
(dependency required by "=dev-perl/Lab-Zhinst-2.40.0-r1" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.