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

Calculating dependencies ... done!
Dependency resolution took 0.87 s (backtrack: 1/20).


!!! All ebuilds that could satisfy "dev-libs/cudnn" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-libs/cudnn-9.25.1.1::gentoo (masked by: NVIDIA-cuDNN license(s))
A copy of the 'NVIDIA-cuDNN' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/NVIDIA-cuDNN'.

- dev-libs/cudnn-9.17.0.29::gentoo (masked by: NVIDIA-cuDNN license(s))
- dev-libs/cudnn-9.14.0.64::gentoo (masked by: NVIDIA-cuDNN license(s))
- dev-libs/cudnn-9.8.0.87-r1::gentoo (masked by: NVIDIA-cuDNN license(s))
- dev-libs/cudnn-8.9.7.29-r1::gentoo (masked by: NVIDIA-cuDNN license(s))
- dev-libs/cudnn-8.8.0.121::gentoo (masked by: NVIDIA-cuDNN license(s))
- dev-libs/cudnn-8.6.0.163::gentoo (masked by: NVIDIA-cuDNN license(s))

(dependency required by "sci-ml/cudnn-frontend-1.11.0::gentoo" [ebuild])
(dependency required by "=sci-ml/cudnn-frontend-1.11.0" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.