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

Calculating dependencies ... done!
Dependency resolution took 1.52 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/libuv-1.52.1:0/1::gentoo [1.51.0-r1:0/1::gentoo] USE="-verify-sig" 1323 KiB

Total: 1 package (1 upgrade), Size of downloads: 1323 KiB