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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] dev-lang/ocaml-5.5.1:0/5.5.1::gentoo  USE="ocamlopt -emacs -flambda -latex -test -xemacs" 6457 KiB
[ebuild  N     ] dev-ml/dune-3.23.1:0/3.23.1::gentoo  USE="-emacs -test" 3624 KiB
[ebuild  N     ] dev-ml/camlp-streams-5.0.1::gentoo  USE="ocamlopt" 17 KiB
[ebuild  N     ] dev-ml/easy-format-1.3.4:0/1.3.4::gentoo  USE="ocamlopt" 16 KiB
[ebuild  N     ] dev-ml/biniou-1.2.2-r1:0/1.2.2::gentoo  USE="ocamlopt" 24 KiB

Total: 5 packages (5 new), Size of downloads: 10137 KiB