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

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] media-libs/libxtract-0.6.6::gentoo  USE="-doc -fftw" 469 KiB

Total: 1 package (1 new), Size of downloads: 469 KiB