nix: add outputs for each supported ocaml version#34

Alizter wants to merge 3 commits intoocaml-dune:mainocaml-dune/fiber:mainfrom

Alizter:ps/branch/nix__add_outputs_for_each_supported_ocaml_versionAlizter/fiber:ps/branch/nix__add_outputs_for_each_supported_ocaml_versionCopy head branch name to clipboard