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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/isa-l_crypto-2.25.0::gentoo  CPU_FLAGS_X86="avx512f" 819 KiB

Total: 1 package (1 new), Size of downloads: 819 KiB