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

Calculating dependencies ... done!
Dependency resolution took 1.49 s (backtrack: 0/20).

[ebuild  NS    ] sys-kernel/gentoo-sources-7.3.0:7.3.0::gentoo [6.19.6:6.19.6::gentoo] USE="build symlink -experimental -vanilla%" 158606 KiB

Total: 1 package (1 in new slot), Size of downloads: 158606 KiB