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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] sci-libs/spooles-2.2::gentoo  USE="threads -mpi -static-libs" 4405 KiB

Total: 1 package (1 new), Size of downloads: 4405 KiB