Package cow

Failed to find a solution:

no platform:
2024-01-29 15:03.44 [INFO] Solving for ocaml-base-compiler, ocaml,
                           cow using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:03.50 [INFO] base: eliminated all possibilities in 2.64 s

2024-01-29 15:03.50 [INFO] = base =

2024-01-29 15:03.50 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-bytes.base base-ocamlbuild.base
          base-threads.base base-unix.base cppo.1.6.9 dune.3.13.0
          ezjsonm.1.0.0 hex.1.3.0 jsonm.1.0.1 oasis.0.4.11 ocaml-config.3
          ocaml-secondary-compiler.4.08.1-1 ocamlbuild.0 ocamlfind.1.9.6
          ocamlfind-secondary.1.9.6 ocamlify.0.0.1 ocamlmod.0.0.9
          ocplib-endian.1.1 omd.1.3.1 ppx_derivers.1.2.1 ppx_deriving.4.5-1
          ppx_tools.5.0+4.02.0 ppxfind.1.4 re.1.10.3 result.1.5 seq.0.3.1
          sexplib.113.24.00 stringext.1.6.0 topkg.1.0.0 uchar.0.0.2 uri.1.9.2
          uutf.1.0.2 xmlm.1.3.0 cow&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler ocaml&ocamlfind-secondary
- cow -> cow.2.0.0
    User requested = 2.0.0
- cstruct -> cstruct.3.0.2
    hex 1.3.0 requires >= 1.7.0 & < 5.0.0
- jbuilder -> jbuilder.1.0+beta20.2
    dune 3.13.0 requires not(= transition)
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.0
    base-ocamlbuild base requires >= 3.10 & < 4.03
- 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-migrate-parsetree -> ocaml-migrate-parsetree.1.8.0
    ppx_deriving 4.5-1 requires < 2.0.0
- ppx_sexp_conv -> (problem)
    uri 1.9.2 requires >= 113.33.01
    Rejected candidates:
      ppx_sexp_conv.v0.16.0: Requires ocaml >= 4.14.0
      ppx_sexp_conv.v0.15.1: Requires ocaml >= 4.08.0
      ppx_sexp_conv.v0.15.0: Requires ocaml >= 4.08.0
      ppx_sexp_conv.v0.14.3: Requires ocaml >= 4.04.2
      ppx_sexp_conv.v0.14.2: Requires ocaml >= 4.04.2
      ...