Package eio

Failed to find a solution:

no platform:
2025-02-03 22:05.31 [INFO] Solving for ocaml-base-compiler, ocaml,
                           eio using opam_repository_commit f872de4b7a2f4b7ccc24dfe491575cabe8c9fabe

2025-02-03 22:06.57 [INFO] base: eliminated all possibilities in 1.32 s

2025-02-03 22:06.57 [INFO] = base =

2025-02-03 22:06.57 [INFO] Can't find all required versions.
Selected: base-domains.base base-threads.base base-unix.base cstruct.6.2.0
          dune.3.17.2 fmt.0.9.0 lwt-dllist.1.0.1 mtime.2.1.0 ocaml-config.3
          ocamlbuild.0.15.0 ocamlfind.1.9.6 optint.0.3.0 psq.0.2.1 seq.base
          topkg.1.0.7 eio&ocaml&ocaml-base-compiler ocaml ocaml-base-compiler
          ocaml-base-compiler ocaml
- eio -> eio.0.1
    User requested = 0.1
- ocaml -> ocaml.5.1.1
    User requested <= 5.1.1
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    eio 0.1 requires not(>= 5.0.0~beta1)
    Rejected candidates:
      ocaml-base-compiler.5.3.0: Incompatible with restriction: not(>= 5.0.0~beta1)
      ocaml-base-compiler.5.3.0~rc1: Incompatible with restriction: not(>= 5.0.0~beta1)
      ocaml-base-compiler.5.3.0~beta2: Incompatible with restriction: not(>= 5.0.0~beta1)
      ocaml-base-compiler.5.3.0~beta1: Incompatible with restriction: not(>= 5.0.0~beta1)
      ocaml-base-compiler.5.3.0~alpha1: Incompatible with restriction: not(>= 5.0.0~beta1)
      ...