Package rpc

Failed to find a solution:

no platform:
2024-09-12 08:13.38 [INFO] Solving for ocaml-base-compiler, ocaml,
                           rpc using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:13.46 [INFO] base: eliminated all possibilities in 3.67 s

2024-09-12 08:13.46 [INFO] = base =

2024-09-12 08:13.46 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base 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 rpc&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler system-mingw ocaml
          base-domains ocaml-base-compiler
- 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~
- rpc -> rpc.1.2.0
    User requested = 1.2.0
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied
- type_conv -> (problem)
    rpc 1.2.0 requires = 108.00.02
    Rejected candidates:
      type_conv.113.00.02: Incompatible with restriction: = 108.00.02
      type_conv.113.00.01: Incompatible with restriction: = 108.00.02
      type_conv.113.00.00: Incompatible with restriction: = 108.00.02
      type_conv.112.01.02: Incompatible with restriction: = 108.00.02
      type_conv.112.01.01: Incompatible with restriction: = 108.00.02
      ...