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

Calculating dependencies ... done!
Dependency resolution took 1.56 s (backtrack: 0/20).

[ebuild     U  ] net-libs/gnutls-3.8.13:0/30.30::gentoo [3.8.12-r1:0/30.30::gentoo] USE="cxx idn nls openssl pkcs11 post-quantum tls-heartbeat zlib -brotli -dane -doc -examples -sslv2 -sslv3 -static-libs -systemtap -test -test-full -tools -verify-sig -zstd" 7105 KiB

Total: 1 package (1 upgrade), Size of downloads: 7105 KiB