Package piqi

Failed to find a solution:

no platform:
2024-09-12 08:00.15 [INFO] Solving for ocaml-base-compiler, ocaml,
                           piqi using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:00.21 [INFO] base: eliminated all possibilities in 2.93 s

2024-09-12 08:00.21 [INFO] = base =

2024-09-12 08:00.21 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base dune.3.16.0 easy-format.1.3.4
          host-arch-x86_64.1 ocaml-config.3 ocaml-options-vanilla.1
          ocamlbuild.0.15.0 ocamlfind.1.9.6 topkg.1.0.7 xmlm.1.4.0
          piqi&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler system-mingw ocaml base-domains ocaml
          ocaml-base-compiler
- camlp4 -> (problem)
    piqi 0.6.0 requires < 4.02
    Rejected candidates:
      camlp4.5.2: Requires ocaml >= 5.2 & < 5.3
      camlp4.5.1: Incompatible with restriction: < 4.02
      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
      ...
- ocaml -> ocaml.5.1.1
    User requested <= 5.1.1
- ocaml-base-compiler -> ocaml-base-compiler.5.1.1
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.1~ & < 5.1.2~
- piqi -> piqi.0.6.0
    User requested = 0.6.0
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied
- ulex -> (problem)
    Rejected candidates:
      ulex.1.2: Requires ocaml < 5.0
      ulex.1.1: Requires ocaml < 4.06.0