Package genlet

Failed to find a solution:

no platform:
2024-01-29 14:48.42 [INFO] Solving for ocaml-base-compiler, ocaml,
                           genlet using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:48.48 [INFO] base: eliminated all possibilities in 2.64 s

2024-01-29 14:48.48 [INFO] = base =

2024-01-29 14:48.48 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-metaocaml-ocamlfind.base
          base-nnp.base base-threads.base base-unix.base ocaml-config.3
          ocaml-options-vanilla.1 ocamlfind.1.9.6
          genlet&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml base-domains ocaml-base-compiler
- delimcc -> (problem)
    Rejected candidates:
      delimcc.2023.06.17: Requires ocaml >= 4.12.0 & < 5.0.0
      delimcc.2020.10.08: Requires ocaml >= 4.07.0 & < 4.12.0
      delimcc.2018.03.16: Requires ocaml >= 4.04.0 & < 4.10.0
      delimcc.2017.03.02: Requires ocaml >= 4.04.0 & < 4.10.0
      delimcc.2013.08.00: Requires ocaml < 4.03.0
- genlet -> genlet.201406
    User requested = 201406
- ocaml -> ocaml.5.1.0
    User requested <= 5.1.0
- ocaml-base-compiler -> ocaml-base-compiler.5.1.0
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.0~ & < 5.1.1~
- ocaml-variants -> (problem)
    Rejected candidates:
      ocaml-variants.5.3.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.2.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.1.2+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.1.1+tsan: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.1.1+options: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ...