okay, not sure, still cannot install js_of_ocaml-toplevel with the same
error after opam full update

On Tue, 28 May 2019 at 20:40, Kenichi Asai <asai@is.ocha.ac.jp> wrote:

> Thanks for the e-mail.  Yes, you need js_of_ocaml-toplevel and some
> other js_of_ocaml packages.  I also installed them with opam 2.0.4:
>
> > js_of_ocaml             3.4.0
> > js_of_ocaml-compiler    3.4.0
> > js_of_ocaml-ppx         3.4.0
> > js_of_ocaml-toplevel    3.4.0
>
> On MacOS, I had no problem installing them...
>
> --
> Kenichi Asai
>