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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] net-misc/aria2-1.37.0::gentoo  USE="libxml2 nettle nls sqlite ssh ssl -adns -bittorrent (-gnutls) -libuv -metalink -scripts -tcmalloc -test -xmlrpc" 1666 KiB

Total: 1 package (1 new), Size of downloads: 1666 KiB