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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libatomic_ops-7.10.0::gentoo  531 KiB
[ebuild  N     ] dev-libs/mimalloc-3.4.5:0/3::gentoo  USE="-debug -test" 1391 KiB
[ebuild  N     ] dev-lang/moarvm-2026.09::gentoo  USE="jit (-asan) -clang -debug -doc -optimize -static-libs -ubsan" 8467 KiB
[ebuild  N     ] dev-lang/nqp-2026.09::gentoo  USE="moar -clang -doc (-java) -test" 9512 KiB

Total: 4 packages (4 new), Size of downloads: 19899 KiB