Hi.

It looks like your ocamlbuild is fairly outdated and will not build with
OCaml compilers above 4.03.

Have you tried the opam upgrade suggested command?

Romain

Le jeu. 3 janv. 2019 à 10:09, Lyonel Bernard <lyonel.bern...@gmail.com> a
écrit :

> I do not know what to do
>
> $ opam update
>
> <><> Updating package repositories
> ><><><><><><><><><><><><><><><><><><><><><><>
> [default] synchronised from https://opam.ocaml.org/
> Now run 'opam upgrade' to apply any package updates.
> $ opam upgrade
> Everything as up-to-date as possible (run with --verbose to show
> unavailable
> upgrades).
>
> The following packages are not being upgraded because the new versions
> conflict
> with other installed packages:
>   - camlp4.4.07+system
>   - cmdliner.1.0.3
>   - liquidsoap.1.3.5
>   - ocaml.4.07.1
>     ∗ base-ocamlbuild.base is installed and requires ocaml (>= 3.10 & <
> 4.03)
>   - ocamlbuild.0.12.0
>   - pcre.7.3.5
>   - seq.base
> However, you may "opam upgrade" these packages explicitly, which will ask
> permission to downgrade or uninstall the conflicting packages.
> Nothing to do.
> # Run eval $(opam env) to update the current shell environment
>
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