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

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

[ebuild  N     ] app-arch/libdeflate-1.25::gentoo  USE="utils -test" 193 KiB
[ebuild  N     ] media-gfx/oxipng-10.1.1::gentoo  USE="-debug" 30008 KiB

Total: 2 packages (2 new), Size of downloads: 30200 KiB