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

Calculating dependencies ... done!
Dependency resolution took 1.07 s (backtrack: 0/20).

[ebuild   R    ] x11-libs/cairo-1.18.4-r1::gentoo  USE="X glib (-aqua) (-debug) -gtk-doc -lzo -test" 41892 KiB

Total: 1 package (1 reinstall), Size of downloads: 41892 KiB