Package ocaml-xml-rpc

Failed to find a solution:

no platform:
2024-01-29 14:53.18 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ocaml-xml-rpc using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:53.24 [INFO] base: eliminated all possibilities in 2.73 s

2024-01-29 14:53.24 [INFO] = base =

2024-01-29 14:53.24 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base ocaml-config.3
          ocaml-options-vanilla.1 ocamlfind.1.9.6 pxp.1.2.9
          ocaml-xml-rpc&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml base-domains ocaml-base-compiler
- annexlib -> (problem)
    Rejected candidates:
      annexlib.0.13.5: Requires ocaml < 4.06.0
- 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~
- ocaml-xml-rpc -> ocaml-xml-rpc.0.2.3
    User requested = 0.2.3
- ocamlnet -> (problem)
    ocaml-xml-rpc 0.2.3 requires >= 3.6.0 & < 4.0.0
    Rejected candidates:
      ocamlnet.4.1.9-2: Incompatible with restriction: >= 3.6.0 & < 4.0.0
      ocamlnet.4.1.9-1: Incompatible with restriction: >= 3.6.0 & < 4.0.0
      ocamlnet.4.1.9: Incompatible with restriction: >= 3.6.0 & < 4.0.0
      ocamlnet.4.1.8: Incompatible with restriction: >= 3.6.0 & < 4.0.0
      ocamlnet.4.1.7: Incompatible with restriction: >= 3.6.0 & < 4.0.0
      ...
- ulex -> (problem)
    Rejected candidates:
      ulex.1.2: Requires ocaml < 5.0
      ulex.1.1: Requires ocaml < 4.06.0