[Tactician] Upgrade minimum dune after fix of ocaml/dune#8958

[LasseBlaauwbroek]

No description provided.

[silene]

Note that, despite the "success" status of the CI, it never succeeded in installing any of the packages. (I suppose that we should at least tweak the build:any job, so that it becomes an error if it installed nothing, rather than a vacuous success.)

[LasseBlaauwbroek]

Indeed. I don't really understand what is going on anyway. The logs say that the package cannot be installed with the current compiler. But then, the subsequent message says that the package can be installed without changing to another compiler....

[silene]

This is just a wild guess, but I think you are confusing opam by having a dependency on opam-client. As a consequence, it would have to reinstall itself on the fly to succeed, which I guess it really does not want to do.

[LasseBlaauwbroek]

I had forgotten to update some requirements, leading to no solution existing. The tests pass now (non-vacuously).