dune pkg and utop

[bikallem]

I am using dune to manage packages. How do I install and start utop? I have this dune-project:

(package 
    (name pgk1)
    (depends
        ocaml
        (utop :dev)))

invoking dune build or dune pkg lock doesn't seem to install(?) utop. How do I install utop in my current configuration? Is this not supported yet?

[Alizter]

Extra packages used for development in opam are typically marked with :with-dev-setup as :dev is specifically about build time dependencies of the development version of an opam project.

With dune pkg, we have support for a concept known as "dev tools" which you can configure by running dune tools install utop. Afterwards you should be able to use dune utop which should be using the correct utop.

Unfortunately the implementation of dev tools is a bit buggy at the moment, so don't be surprised if you run into some issues. We are currently in the process of redesigning and reimplementing dev tools which can be found here #13457 if you are interested.

[bikallem]

Extra packages used for development in opam are typically marked with :with-dev-setup as :dev is specifically about build time dependencies of the development version of an opam project.

I did try (utop :with-dev-setup) but that didn't work, i.e. utop not installed.

Just tried dune tools install utop. But gave me an error when trying dune utop:

File "_build/_private/default/.dev-tool/utop/target/lib/utop/dune-package", line 71, characters 2-10:
71 |   logs.lwt
       ^^^^^^^^
Error: Library "logs.lwt" in
_build/_private/default/.pkg/logs.0.10.0-91e977b1780a1d4171c9452e177022f4/target/lib/logs/lwt
is hidden (unsatisfied 'exists_if').
-> required by library "utop" in
   _build/_private/default/.dev-tool/utop/target/lib/utop
-> required by _build/default/.utop/utop.bc