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

Calculating dependencies ... done!
Dependency resolution took 1.58 s (backtrack: 0/20).

[ebuild  N     ] app-crypt/argon2-20190702-r1:0/1::gentoo  USE="-static-libs" 1471 KiB
[ebuild  N     ] acct-group/unrealircd-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/unrealircd-0-r2::gentoo  0 KiB
[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
[ebuild  N     ] dev-libs/jansson-2.15.1:0/4::gentoo  USE="-doc -static-libs" 478 KiB
[ebuild  N     ] net-irc/unrealircd-6.2.6::gentoo  USE="operoverride -class-nofakelag -curl -geoip -geoip-classic -operoverride-verify -verify-sig" 11505 KiB

Total: 6 packages (1 upgrade, 5 new), Size of downloads: 15414 KiB