Package mirage-fs-unix

Failed to find a solution:

no platform:
2024-01-29 14:59.12 [INFO] Solving for ocaml-base-compiler, ocaml,
                           mirage-fs-unix using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:59.18 [INFO] base: eliminated all possibilities in 2.40 s

2024-01-29 14:59.18 [INFO] = base =

2024-01-29 14:59.18 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-bytes.base base-domains.base base-nnp.base
          base-threads.base base-unix.base cppo.1.6.9 csexp.1.5.2
          cstruct.6.2.0 cstruct-lwt.6.2.0 dune.3.13.0
          dune-configurator.3.13.0 fmt.0.9.0 lwt.5.7.0
          ocaml-options-vanilla.1 ocamlbuild.0.14.3 ocamlfind.1.9.6
          ocplib-endian.1.2 topkg.1.0.7
          mirage-fs-unix&ocaml&ocaml-base-compiler ocaml base-domains ocaml
          ocaml-base-compiler
- mirage-fs-unix -> mirage-fs-unix.1.0.0
    User requested = 1.0.0
- mirage-types -> mirage-types.0.5.0
    mirage-fs-unix 1.0.0 requires >= 0.5.0 & < 1.0.0
- ocaml -> (problem)
    User requested <= 5.1.0
    base-bytes base requires >= 4.02.0
    cppo 1.6.9 requires >= 4.02.3
    csexp 1.5.2 requires >= 4.03.0
    cstruct 6.2.0 requires >= 4.08.0
    mirage-fs-unix 1.0.0 requires = 0
    Rejected candidates:
      ocaml.5.1.0: Incompatible with restriction: = 0
      ocaml.5.0.1: Incompatible with restriction: = 0
      ocaml.5.0.0: Incompatible with restriction: = 0
      ocaml.4.14.2: Incompatible with restriction: = 0
      ocaml.4.14.1: Incompatible with restriction: = 0
      ...
- ocaml-base-compiler -> ocaml-base-compiler.5.1.1
    User requested >= 4.04.1