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

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/skalibs-2.15.0.0:0/2.15.0::gentoo  262 KiB
[ebuild  N     ] dev-lang/execline-2.9.9.1:0/2.9.0::gentoo  117 KiB
[ebuild  N     ] sys-apps/s6-2.15.0.0:0/2.15::gentoo  USE="execline" 271 KiB
[ebuild  N     ] sys-apps/s6-rc-0.6.0.0-r1:0/0.6::gentoo  USE="-system-init" 153 KiB

Total: 4 packages (4 new), Size of downloads: 802 KiB