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

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] app-arch/bzip3-1.5.4::gentoo  279 KiB
[ebuild  N     ] dev-libs/lzo-2.10:2::gentoo  USE="(split-usr) -examples -static-libs" 587 KiB
[ebuild  N     ] app-arch/lz4-1.10.0-r1:0/1.10.0-meson::gentoo  USE="-static-libs -test" 379 KiB
[ebuild  N     ] app-arch/lrzip-next-0.14.1::gentoo  USE="largefile -asm -static-libs -year2038" 592 KiB

Total: 4 packages (4 new), Size of downloads: 1835 KiB