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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/yajl-2.1.0-r6:0/2::gentoo  83 KiB
[ebuild  N     ] dev-libs/modsecurity-3.0.15:0/3::gentoo  USE="json -doc -fuzzyhash -geoip -geoip2 -lmdb -lua" LUA_SINGLE_TARGET="lua5-1 -lua5-3 -lua5-4" 11506 KiB

Total: 2 packages (2 new), Size of downloads: 11588 KiB