Package ocaml-variants

Failed to find a solution:

no platform:
2025-02-03 22:44.41 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ocaml-variants using opam_repository_commit f872de4b7a2f4b7ccc24dfe491575cabe8c9fabe

2025-02-03 22:44.44 [INFO] base: eliminated all possibilities in 1.32 s

2025-02-03 22:44.44 [INFO] = base =

2025-02-03 22:44.44 [INFO] Can't find all required versions.
Selected: ocaml-config.3 ocamlfind.1.9.6
          ocaml-variants&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- lwt -> (problem)
    Rejected candidates:
      lwt.5.9.0: Requires ocaml >= 4.08
      lwt.5.8.0: Requires ocaml >= 4.08
      lwt.5.7.0: Requires ocaml >= 4.08
      lwt.5.6.1: Requires ocaml >= 4.08 & < 5.1
      lwt.5.6.0: Requires ocaml >= 4.08 & < 5.1
      ...
- ocaml -> ocaml.4.00.1
    User requested <= 5.1.1
    ocaml-variants 4.00.1+mirage-xen requires = 4.00.1
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    Rejected candidates:
      ocaml-base-compiler.5.3.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.3.0~rc1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.3.0~beta2: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.3.0~beta1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.3.0~alpha1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ...
- ocaml-variants -> ocaml-variants.4.00.1+mirage-xen
    User requested = 4.00.1+mirage-xen
- xenbigarray -> (problem)
    No known implementations at all