Package unix-sys-stat

Failed to find a solution:

no platform:
2025-05-16 17:18.13 [INFO] Solving for ocaml-base-compiler,
                           unix-sys-stat, constraints ocaml-base-compiler<=5.3.0,
                           unix-sys-stat=0.4.0 using opam_repository_commit cf409d95af00ff822422bd76b657ed213b661401

2025-05-16 17:18.15 [INFO] base: eliminated all possibilities in 0.56 s

2025-05-16 17:18.15 [INFO] = base =

2025-05-16 17:18.15 [INFO] Can't find all required versions.
Selected: base-bytes.base base-threads.base base-unix.base dune.3.18.2
          integers.0.7.0 ocaml.5.5.0 ocaml-config.3 ocaml-options-vanilla.1
          ocamlbuild.0.16.1 ocamlfind.1.9.8 result.1.5 stdlib-shims.0.3.0
          unix-errno.0.6.2 unix-sys-stat&ocaml-base-compiler ocaml-variants
          ocaml-base-compiler ocaml-base-compiler
- ctypes -> (problem)
    unix-sys-stat 0.4.0 requires not(>= 0.7.0)
    Rejected candidates:
      ctypes.0.23.0: Incompatible with restriction: not(>= 0.7.0)
      ctypes.0.22.0: Incompatible with restriction: not(>= 0.7.0)
      ctypes.0.21.1: Requires ocaml >= 4.03.0 & < 5.2
      ctypes.0.20.2: Requires ocaml >= 4.03.0 & < 5.2
      ctypes.0.20.1: Requires ocaml >= 4.03.0 & < 5.2
      ...
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0
    User requested <= 5.3.0
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.3.0 requires = 5.3.0
    Rejected candidates:
      ocaml-compiler.5.5: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.4: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0: Requires ocaml = 5.3.0
      ocaml-compiler.5.3.0~rc1: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0~beta2: Incompatible with restriction: = 5.3.0
      ...
- ocaml-variants -> (problem)
    Rejected candidates:
      ocaml-variants.5.5.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.4.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.1+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.0+options: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.0+BER: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ...
- posix-types -> posix-types.0.1.1
    unix-sys-stat 0.4.0 requires < 2.0.0
- unix-sys-stat -> unix-sys-stat.0.4.0
    User requested = 0.4.0
- unix-type-representations -> (problem)
    Rejected candidates:
      unix-type-representations.0.1.2: Requires ocaml < 5.0.0
      unix-type-representations.0.1.1: Requires ocaml < 5.0.0
      unix-type-representations.0.1.0: Requires ocaml < 5.0.0