Package zero

Failed to find a solution:

no platform:
2024-01-29 14:45.57 [INFO] Solving for ocaml-base-compiler, ocaml,
                           zero using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:46.02 [INFO] base: eliminated all possibilities in 2.53 s

2024-01-29 14:46.02 [INFO] = base =

2024-01-29 14:46.02 [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
          zero&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- core -> (problem)
    zero 109.21.00 requires >= 109.21.00 & <= 109.24.00
    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~
      ...
- fieldslib -> fieldslib.109.20.00
    zero 109.21.00 requires = 109.20.00
- 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
      ...
- 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
      ...
- pa_ounit -> (problem)
    zero 109.21.00 requires >= 109.15.00 & <= 109.18.00
    Rejected candidates:
      pa_ounit.113.00.00: Requires type_conv >= 113.00.00 & < 113.01.00
      pa_ounit.112.35.00: Incompatible with restriction: >= 109.15.00 & <= 109.18.00
      pa_ounit.112.24.00: Incompatible with restriction: >= 109.15.00 & <= 109.18.00
      pa_ounit.112.17.00: Incompatible with restriction: >= 109.15.00 & <= 109.18.00
      pa_ounit.111.28.00: Incompatible with restriction: >= 109.15.00 & <= 109.18.00
      ...
- sexplib -> (problem)
    zero 109.21.00 requires = 109.20.00
    Rejected candidates:
      sexplib.v0.16.0: Requires ocaml >= 4.14.0
      sexplib.v0.15.1: Requires ocaml >= 4.08.0
      sexplib.v0.15.0: Requires ocaml >= 4.08.0 & < 5.0
      sexplib.v0.14.0: Requires ocaml >= 4.04.2
      sexplib.v0.13.0: Requires ocaml >= 4.04.2
      ...
- type_conv -> type_conv.109.53.00
    fieldslib 109.20.00 requires >= 109.20.00 & <= 109.53.00
- zero -> zero.109.21.00
    User requested = 109.21.00