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

Calculating dependencies ... done!
Dependency resolution took 0.86 s (backtrack: 1/20).


!!! All ebuilds that could satisfy "dev-util/nvidia-cuda-toolkit:=" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-util/nvidia-cuda-toolkit-13.4.1::gentoo (masked by: NVIDIA-CUDA license(s))
A copy of the 'NVIDIA-CUDA' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/NVIDIA-CUDA'.

- dev-util/nvidia-cuda-toolkit-12.9.2::gentoo (masked by: NVIDIA-CUDA license(s))
- dev-util/nvidia-cuda-toolkit-11.8.0-r4::gentoo (masked by: NVIDIA-CUDA license(s))

(dependency required by "dev-libs/cutlass-4.2.1::gentoo" [ebuild])
(dependency required by "=dev-libs/cutlass-4.2.1" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.