Package hydro

Failed to find a solution:

no platform:
2024-01-29 14:55.00 [INFO] Solving for ocaml-base-compiler, ocaml,
                           hydro using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:55.06 [INFO] base: eliminated all possibilities in 2.73 s

2024-01-29 14:55.06 [INFO] = base =

2024-01-29 14:55.06 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base conf-libpcre.1 conf-pkg-config.3
          csexp.1.5.2 dune.3.13.0 dune-configurator.3.13.0 ocaml-config.3
          ocaml-options-vanilla.1 ocamlfind.1.9.6 omake.0.10.6 pcre.7.5.0
          hydro&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml base-domains ocaml ocaml-base-compiler
- hydro -> hydro.0.7.1
    User requested = 0.7.1
- 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~
- ocamlnet -> (problem)
    hydro 0.7.1 requires = 3.6.0
    Rejected candidates:
      ocamlnet.4.1.9-2: Incompatible with restriction: = 3.6.0
      ocamlnet.4.1.9-1: Incompatible with restriction: = 3.6.0
      ocamlnet.4.1.9: Incompatible with restriction: = 3.6.0
      ocamlnet.4.1.8: Incompatible with restriction: = 3.6.0
      ocamlnet.4.1.7: Incompatible with restriction: = 3.6.0
      ...