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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] sys-apps/busybox-1.36.1-r4::gentoo  USE="pam -debug -livecd -make-symlinks -math -mdev -savedconfig (-selinux) -sep-usr -static -syslog" 2467 KiB

Total: 1 package (1 new), Size of downloads: 2467 KiB