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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libtar-1.2.20-r6::gentoo  USE="zlib" 63 KiB

Total: 1 package (1 new), Size of downloads: 63 KiB