Package async_core

Failed to find a solution:

no platform:
2024-09-12 08:20.07 [INFO] Solving for ocaml-base-compiler, ocaml,
                           async_core using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:20.14 [INFO] base: eliminated all possibilities in 3.11 s

2024-09-12 08:20.14 [INFO] = base =

2024-09-12 08:20.14 [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
          async_core&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- async_core -> async_core.109.22.00
    User requested = 109.22.00
- bin_prot -> bin_prot.109.15.01
    async_core 109.22.00 requires = 109.15.01
- core -> (problem)
    async_core 109.22.00 requires >= 109.22.00 & <= 109.23.00
    Rejected candidates:
      core.v0.17.1: Incompatible with restriction: >= 109.22.00 & <= 109.23.00
      core.v0.17.0: Incompatible with restriction: >= 109.22.00 & <= 109.23.00
      core.v0.16.2: Incompatible with restriction: >= 109.22.00 & <= 109.23.00
      core.v0.16.1: Incompatible with restriction: >= 109.22.00 & <= 109.23.00
      core.v0.16.0: Incompatible with restriction: >= 109.22.00 & <= 109.23.00
      ...
- fieldslib -> fieldslib.109.20.00
    async_core 109.22.00 requires = 109.20.00
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.1
    async_core 109.22.00 requires >= 4.00.0 & < 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
      ...
- pa_ounit -> (problem)
    async_core 109.22.00 requires = 109.18.00
    Rejected candidates:
      pa_ounit.113.00.00: Incompatible with restriction: = 109.18.00
      pa_ounit.112.35.00: Incompatible with restriction: = 109.18.00
      pa_ounit.112.24.00: Incompatible with restriction: = 109.18.00
      pa_ounit.112.17.00: Incompatible with restriction: = 109.18.00
      pa_ounit.111.28.00: Incompatible with restriction: = 109.18.00
      ...
- sexplib -> sexplib.109.20.00
    async_core 109.22.00 requires = 109.20.00
- type_conv -> type_conv.109.28.00
    bin_prot 109.15.01 requires >= 109.15.00 & <= 109.28.00
- zero -> zero.109.21.00
    async_core 109.22.00 requires = 109.21.00