Package ctypes

Failed to find a solution:

no platform:
2024-01-29 15:14.41 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ctypes using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:14.47 [INFO] base: eliminated all possibilities in 2.65 s

2024-01-29 15:14.47 [INFO] = base =

2024-01-29 15:14.47 [INFO] Can't find all required versions.
Selected: base-ocamlbuild.base base-unix.base oasis.0.4.11 ocaml-config.3
          ocamlbuild.0 ocamlfind.1.9.6 ocamlify.0.0.1 ocamlmod.0.0.9
          ounit.2.2.7 ctypes&ocaml&ocaml-base-compiler oasis
          ocaml-base-compiler ocaml-base-compiler
- ctypes -> ctypes.0.1.1
    User requested = 0.1.1
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.0
    base-ocamlbuild base requires >= 3.10 & < 4.03
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    Rejected candidates:
      ocaml-base-compiler.5.1.1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.1~rc1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.0: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc3: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc2: Requires ocaml = 5.1.0
      ...
- ounit2 -> (problem)
    ounit 2.2.7 requires = 2.2.7
    Rejected candidates:
      ounit2.2.2.7: Requires ocaml >= 4.04.0
      ounit2.2.2.6: Incompatible with restriction: = 2.2.7
      ounit2.2.2.5: Incompatible with restriction: = 2.2.7
      ounit2.2.2.4: Incompatible with restriction: = 2.2.7
      ounit2.2.2.3: Incompatible with restriction: = 2.2.7
      ...