Package ospec

Failed to find a solution:

no platform:
2024-01-29 15:01.44 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ospec using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:01.50 [INFO] base: eliminated all possibilities in 2.29 s

2024-01-29 15:01.50 [INFO] = base =

2024-01-29 15:01.50 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base camlp-streams.5.0.1 camlp4.5.0
          dune.3.13.0 ocaml-options-vanilla.1 ocamlbuild.0.14.3
          ocamlfind.1.9.6 ospec&ocaml&ocaml-base-compiler ocaml base-domains
          ocaml ocaml-base-compiler
- ocaml -> (problem)
    User requested <= 5.1.0
    camlp-streams 5.0.1 requires >= 4.02.3
    camlp4 5.0 requires >= 5.0 & < 5.1~~
    ocaml-base-compiler 5.1.1 requires = 5.1.1
    Rejected candidates:
      ocaml.5.1.0: Incompatible with restriction: >= 5.0 & < 5.1~~
      ocaml.5.0.1: Incompatible with restriction: = 5.1.1
      ocaml.5.0.0: Incompatible with restriction: = 5.1.1
      ocaml.4.14.2: Incompatible with restriction: >= 5.0 & < 5.1~~
      ocaml.4.14.1: Incompatible with restriction: >= 5.0 & < 5.1~~
      ...
- ocaml-base-compiler -> ocaml-base-compiler.5.1.1
    User requested >= 4.04.1
- ospec -> ospec.0.3.0
    User requested = 0.3.0