Package mirage-xen

Failed to find a solution:

no platform:
2024-05-29 14:58.49 [INFO] Solving for ocaml-base-compiler, ocaml,
                           mirage-xen using opam_repository_commit 7311123dcaba6b163a96ad2219b8cc4e59df93a3

2024-05-29 14:58.55 [INFO] base: eliminated all possibilities in 2.72 s

2024-05-29 14:58.55 [INFO] = base =

2024-05-29 14:58.55 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base ocaml-config.3
          ocaml-options-vanilla.1 mirage-xen&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler ocaml base-domains
          ocaml-base-compiler
- mirage-xen -> (problem)
    User requested = 2.6.0
    No usable implementations:
      mirage-xen.8.0.3: Rejected by user-specified constraint mirage-xen (= 2.6.0)
      mirage-xen.8.0.2: Rejected by user-specified constraint mirage-xen (= 2.6.0)
      mirage-xen.8.0.1: Rejected by user-specified constraint mirage-xen (= 2.6.0)
      mirage-xen.8.0.0: Rejected by user-specified constraint mirage-xen (= 2.6.0)
      mirage-xen.7.2.0: Rejected by user-specified constraint mirage-xen (= 2.6.0)
      ...
- ocaml -> ocaml.5.1.1
    User requested <= 5.1.1
- ocaml-base-compiler -> ocaml-base-compiler.5.1.1
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.1~ & < 5.1.2~