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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] app-arch/lz4-1.10.0-r1:0/1.10.0-meson::gentoo  USE="-static-libs -test" 379 KiB
[ebuild  N     ] net-analyzer/nfdump-1.7.6:0/1.7.6::gentoo  USE="-debug -doc -ftconv -jnat -nfpcapd -nfprofile -nftrack -nsel -readpcap -sflow -zstd" 825 KiB

Total: 2 packages (2 new), Size of downloads: 1203 KiB