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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] media-libs/zint-2.15.0:0/2.15::gentoo  USE="png -gui -test" 6207 KiB

Total: 1 package (1 new), Size of downloads: 6207 KiB