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

Calculating dependencies ... done!
Dependency resolution took 1.58 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/elfutils-0.195::gentoo [0.194::gentoo] USE="bzip2 debuginfod libarchive lzma nls utils -stacktrace -static-libs -test -valgrind -verify-sig -zstd" 11751 KiB

Total: 1 package (1 upgrade), Size of downloads: 11751 KiB