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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/libsodium-1.0.22:0/26::gentoo [1.0.21_p20260122:0/26::gentoo] USE="asm urandom -static-libs -verify-sig" CPU_FLAGS_X86="aes sse4_1" 1962 KiB

Total: 1 package (1 upgrade), Size of downloads: 1962 KiB