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

Calculating dependencies ... done!
Dependency resolution took 1.67 s (backtrack: 6/20).

[ebuild  N     ] acct-group/p2p-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-lang/ocaml-4.14.2:0/4.14.2::gentoo  USE="ocamlopt -emacs -flambda -latex -xemacs" 5377 KiB
[ebuild  N     ] acct-user/p2p-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-ml/findlib-1.9.8::gentoo  USE="ocamlopt -doc -tk" 269 KiB
[ebuild  N     ] dev-ml/ocamlbuild-0.16.1:0/0.16.1::gentoo  USE="ocamlopt" 198 KiB
[ebuild  N     ] dev-ml/camlp4-4.14_p1-r2:0/4.14_p1::gentoo  USE="ocamlopt" 627 KiB
[ebuild  N     ] net-p2p/mldonkey-3.2.1::gentoo  USE="ocamlopt -bittorrent -doc -fasttrack -gd -gnutella -magic -upnp" 2774 KiB

Total: 7 packages (7 new), Size of downloads: 9242 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-lang/ocaml:0

  (dev-lang/ocaml-5.5.1:0/5.5.1::gentoo, ebuild scheduled for merge) USE="ocamlopt -emacs -flambda -latex -test -xemacs" conflicts with
    <dev-lang/ocaml-5:=[ocamlopt] required by (net-p2p/mldonkey-3.2.1:0/0::gentoo, ebuild scheduled for merge) USE="ocamlopt -bittorrent -doc -fasttrack -gd -gnutella -magic -upnp"
    ^               ^            


!!! The following update(s) have been skipped due to unsatisfied dependencies
!!! triggered by backtracking:

dev-ml/camlp4:0
dev-ml/findlib:0