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

Calculating dependencies ... done!
Dependency resolution took 1.54 s (backtrack: 0/20).

[ebuild     UD ] net-libs/gnutls-3.8.12:0/30.30::gentoo [3.8.12-r1:0/30.30::gentoo] USE="cxx idn nls openssl pkcs11 tls-heartbeat zlib -brotli -dane -doc -examples -sslv2 -sslv3 -static-libs -systemtap -test -test-full -tools -verify-sig -zstd (-post-quantum%*)" 6787 KiB

Total: 1 package (1 downgrade), Size of downloads: 6787 KiB