Package conf-libobjc2

Failed to find a solution:

no platform:
2024-05-29 13:49.00 [INFO] Solving for ocaml-base-compiler, ocaml,
                           conf-libobjc2 using opam_repository_commit 3eec7358643f24dadea5604a5728497d46f199d0

2024-05-29 13:50.18 [INFO] base: eliminated all possibilities in 1.24 s

2024-05-29 13:50.18 [INFO] = base =

2024-05-29 13:50.18 [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 conf-libobjc2&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler ocaml base-domains
          ocaml-base-compiler
- conf-libobjc2 -> (problem)
    User requested = 1
    No usable implementations:
      conf-libobjc2.1: Availability condition not satisfied
- 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~