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

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] app-arch/gcab-1.6::gentoo  USE="-gtk-doc -introspection -test -vala" 81 KiB

Total: 1 package (1 new), Size of downloads: 81 KiB