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

Calculating dependencies ... done!
Dependency resolution took 1.49 s (backtrack: 0/20).

[ebuild     U  ] dev-util/pkgconf-3.0.3:0/8::gentoo [2.5.1:0/7::gentoo] USE="(native-symlinks) (-test%)" 406 KiB

Total: 1 package (1 upgrade), Size of downloads: 406 KiB