Package sexplib

Failed to find a solution:

no platform:
2024-09-12 08:27.54 [INFO] Solving for ocaml-base-compiler, ocaml,
                           sexplib using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:28.01 [INFO] base: eliminated all possibilities in 3.16 s

2024-09-12 08:28.01 [INFO] = base =

2024-09-12 08:28.01 [INFO] Can't find all required versions.
Selected: base-ocamlbuild.base camlp4.4.02.0-1modular-implicits conf-which.1
          ocaml-config.3 ocamlbuild.0 ocamlfind.1.9.6
          sexplib&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.1
    base-ocamlbuild base requires >= 3.10 & < 4.03
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    Rejected candidates:
      ocaml-base-compiler.5.2.0: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~rc1: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~beta2: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~beta1: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~alpha1: Requires ocaml = 5.2.0
      ...
- ocaml-variants -> (problem)
    camlp4 4.02.0-1modular-implicits requires = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
    Rejected candidates:
      ocaml-variants.5.4.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.3.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.1+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+statmemprof: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+options: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ...
- sexplib -> sexplib.109.47.00
    User requested = 109.47.00
- type_conv -> type_conv.109.47.00
    sexplib 109.47.00 requires = 109.47.00