Package vchan-unix

Failed to find a solution:

no platform:
2024-01-29 15:13.40 [INFO] Solving for ocaml-base-compiler, ocaml,
                           vchan-unix using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:13.45 [INFO] base: eliminated all possibilities in 2.37 s

2024-01-29 15:13.45 [INFO] = base =

2024-01-29 15:13.45 [INFO] Can't find all required versions.
Selected: base-bytes.base base-num.base base-threads.base base-unix.base
          bigarray-compat.1.1.0 cmdliner.1.0.4 conf-xen.1 cppo.1.6.9
          dune-configurator.1.0.0 fmt.0.8.9 io-page-unix.2.3.0
          jbuilder.transition logs.0.7.0 lwt.5.5.0 lwt-dllist.1.0.1
          mirage-flow-lwt.1.6.0 mirage-profile.0.9.1 mmap.1.2.0 num.0
          ocaml-compiler-libs.v0.12.3 ocaml-config.3
          ocaml-migrate-parsetree.2.1.0 ocamlbuild.0.14.3 ocamlfind.1.9.6
          ocplib-endian.1.2 ppx_derivers.1.2.1 ppx_sexp_conv.v0.13.0
          ppx_tools.5.0+4.05.0 result.1.5 seq.0.2.2 sexplib.v0.13.0
          stdlib-shims.0.3.0 topkg.1.0.7 xen-evtchn.2.1.0
          xen-evtchn-unix.2.1.0 xen-gnt.4.0.0 xen-gnt-unix.4.0.0
          xenstore.2.2.0 xenstore_transport.1.3.0
          vchan-unix&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml-syntax-shims
- base -> base.v0.13.2
    parsexp v0.13.0 requires >= v0.13 & < v0.14
- cstruct -> cstruct.5.1.1
    mirage-flow-lwt 1.6.0 requires >= 2.0.0 & < 6.1.0
- dune -> dune.1.11.4
    dune-configurator 1.0.0 requires < 2.0.0
- io-page -> io-page.2.3.0
    io-page-unix 2.3.0 requires = 2.3.0
- mirage-clock -> mirage-clock.2.0.0
    mirage-flow-lwt 1.6.0 requires >= 1.2.0 & < 3.0.0
- mirage-device -> mirage-device.1.2.0
    mirage-clock 2.0.0 requires >= 1.0.0 & < 2.0.0
- mirage-flow -> mirage-flow.1.6.0
    mirage-flow-lwt 1.6.0 requires >= 1.2.0 & < 2.0.0
- ocaml -> ocaml.4.05.1
    User requested <= 5.1.0
    base v0.13.2 requires >= 4.04.2 & < 4.12
    base-num base requires < 4.06.0
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    Rejected candidates:
      ocaml-base-compiler.5.1.1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.1~rc1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.0: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc3: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc2: Requires ocaml = 5.1.0
      ...
- ocaml-syntax-shims -> (problem)
    Rejected candidates:
      ocaml-syntax-shims.1.0.0: Requires dune >= 2.0
- parsexp -> parsexp.v0.13.0
    sexplib v0.13.0 requires >= v0.13 & < v0.14
- ppx_cstruct -> (problem)
    Rejected candidates:
      ppx_cstruct.6.2.0: Requires ocaml >= 4.08.0
      ppx_cstruct.6.1.1: Requires ocaml >= 4.08.0
      ppx_cstruct.6.1.0: Requires ocaml >= 4.08.0
      ppx_cstruct.6.0.1: Requires ocaml >= 4.07.0
      ppx_cstruct.6.0.0: Requires ocaml >= 4.07.0
      ...
- ppxlib -> ppxlib.0.20.0
    ppx_sexp_conv v0.13.0 requires >= 0.9.0 & < 0.25.0
- sexplib0 -> sexplib0.v0.13.0
    base v0.13.2 requires >= v0.13 & < v0.14
- vchan -> (problem)
    vchan-unix 3.0.0 requires = 3.0.0
    Rejected candidates:
      vchan.6.0.1: Requires ocaml >= 4.08.0
      vchan.6.0.0: Requires ocaml >= 4.08.0
      vchan.5.0.0: Requires ocaml >= 4.06.0
      vchan.4.0.3: Incompatible with restriction: = 3.0.0
      vchan.4.0.2: Incompatible with restriction: = 3.0.0
      ...
- vchan-unix -> vchan-unix.3.0.0
    User requested = 3.0.0