Package piqi

Failed to find a solution:

no platform:
2024-01-29 14:47.40 [INFO] Solving for ocaml-base-compiler, ocaml,
                           piqi using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:47.46 [INFO] base: eliminated all possibilities in 2.77 s

2024-01-29 14:47.46 [INFO] = base =

2024-01-29 14:47.46 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base dune.3.13.0 easy-format.1.3.4
          ocaml-config.3 ocaml-options-vanilla.1 ocamlbuild.0.14.3
          ocamlfind.1.9.6 topkg.1.0.7 xmlm.1.4.0
          piqi&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml base-domains ocaml ocaml-base-compiler
- camlp4 -> (problem)
    piqi 0.6.0 requires < 4.02
    Rejected candidates:
      camlp4.5.0: Requires ocaml >= 5.0 & < 5.1~~
      camlp4.4.14+1: Requires ocaml >= 4.14 & < 4.15
      camlp4.4.13+system: Requires ocaml >= 4.13 & < 4.14
      camlp4.4.13+1: Requires ocaml >= 4.13 & < 4.14
      camlp4.4.12+system: Requires ocaml >= 4.12 & < 4.13
      ...
- ocaml -> ocaml.5.1.0
    User requested <= 5.1.0
- ocaml-base-compiler -> ocaml-base-compiler.5.1.0
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.0~ & < 5.1.1~
- piqi -> piqi.0.6.0
    User requested = 0.6.0
- ulex -> (problem)
    Rejected candidates:
      ulex.1.2: Requires ocaml < 5.0
      ulex.1.1: Requires ocaml < 4.06.0