Package core_extended

Failed to find a solution:

no platform:
2024-01-29 14:51.49 [INFO] Solving for ocaml-base-compiler, ocaml,
                           core_extended using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:51.55 [INFO] base: eliminated all possibilities in 2.91 s

2024-01-29 14:51.55 [INFO] = base =

2024-01-29 14:51.55 [INFO] Can't find all required versions.
Selected: base-bytes.backport base-ocamlbuild.base
          camlp4.4.02.0-1modular-implicits conf-libpcre.1 conf-pkg-config.3
          conf-which.1 ocaml-config.3 ocamlfind.1.9.6 ounit.2.2.7
          pa_ounit.109.53.00 pcre.7.2.3 pipebang.109.08.00 res.4.0.7
          core_extended&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- bin_prot -> bin_prot.109.53.00
    core_extended 108.00.01 requires < 113.01.00
- core -> (problem)
    Rejected candidates:
      core.v0.16.2: Requires ocaml >= 4.14.0
      core.v0.16.1: Requires ocaml >= 4.14.0
      core.v0.16.0: Requires ocaml >= 4.14.0 & < 5.1~
      core.v0.15.1: Requires ocaml >= 4.11.0 & < 5.1~
      core.v0.15.0: Requires ocaml >= 4.11.0 & < 5.1~
      ...
- core_extended -> core_extended.108.00.01
    User requested = 108.00.01
- fieldslib -> fieldslib.109.15.00
    core_extended 108.00.01 requires < 113.01.00
- ocaml -> ocaml.3.12.1
    User requested <= 5.1.0
    base-bytes backport requires < 4.02.0
    core_extended 108.00.01 requires = 3.12.1
- 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
      ...
- 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.5.3.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.2+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.1+tsan: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.1+options: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ...
- ocamlbuild -> ocamlbuild.0
    pcre 7.2.3 requires <> 0.9.0
- 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
      ...
- sexplib -> sexplib.109.55.02
    core_extended 108.00.01 requires < 113.01.00
- type_conv -> (problem)
    bin_prot 109.53.00 requires = 109.53.00
    fieldslib 109.15.00 requires = 109.15.00
    Rejected candidates:
      type_conv.113.00.02: Incompatible with restriction: = 109.53.00
      type_conv.113.00.01: Incompatible with restriction: = 109.53.00
      type_conv.113.00.00: Incompatible with restriction: = 109.53.00
      type_conv.112.01.02: Incompatible with restriction: = 109.53.00
      type_conv.112.01.01: Incompatible with restriction: = 109.53.00
      ...