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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] sci-ml/gloo-2023.12.03::gentoo  USE="ssl -cuda -libuv -mpi -redis -test" 254 KiB

Total: 1 package (1 new), Size of downloads: 254 KiB