Package cow

Failed to find a solution:

no platform:
2024-01-29 15:03.45 [INFO] Solving for ocaml-base-compiler, ocaml,
                           cow using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:03.51 [INFO] base: eliminated all possibilities in 2.97 s

2024-01-29 15:03.51 [INFO] = base =

2024-01-29 15:03.51 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-bytes.backport base-ocamlbuild.base
          base-threads.base base-unix.base camlp4.4.02.0-1modular-implicits
          conf-time.1 conf-which.1 cppo.1.6.5 dune.3.13.0 dyntype.0.9.0
          hex.1.3.0 jsonm.1.0.1 ocaml-config.3 ocamlbuild.0 ocamlfind.1.9.6
          ocplib-endian.1.0 omd.1.3.1 ounit.2.2.7 re.1.7.1 result.1.5
          stringext.1.4.3 topkg.1.0.0 uchar.0.0.2 ulex.1.2 uri.1.9.1
          uutf.1.0.2 xmlm.1.2.0 cow&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler
- cow -> cow.0.10.1
    User requested = 0.10.1
- cstruct -> cstruct.1.9.0
    hex 1.3.0 requires >= 1.7.0 & < 5.0.0
- ezjsonm -> ezjsonm.0.3.1
    cow 0.10.1 requires < 0.4.0
- jbuilder -> (problem)
    cppo 1.6.5 requires >= 1.0+beta17
    dune 3.13.0 requires not(= transition)
    Rejected candidates:
      jbuilder.transition: Incompatible with restriction: not(= transition)
      jbuilder.1.0+beta20.2: Requires ocaml >= 4.02.3 & < 5.0
      jbuilder.1.0+beta20.1: Requires ocaml >= 4.02.3 & < 5.0
      jbuilder.1.0+beta20: Requires ocaml >= 4.02.3 & < 4.08.0
      jbuilder.1.0+beta19.1: Requires ocaml >= 4.02.3 & < 4.08.0
      ...
- ocaml -> ocaml.4.01.0
    User requested <= 5.1.0
    base-bytes backport requires < 4.02.0
- 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-variants -> (problem)
    camlp4 4.02.0-1modular-implicits requires = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
    Rejected candidates:
      ocaml-variants.5.3.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.2+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.1+tsan: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.1.1+options: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ...
- ounit2 -> (problem)
    ounit 2.2.7 requires = 2.2.7
    Rejected candidates:
      ounit2.2.2.7: Requires ocaml >= 4.04.0
      ounit2.2.2.6: Incompatible with restriction: = 2.2.7
      ounit2.2.2.5: Incompatible with restriction: = 2.2.7
      ounit2.2.2.4: Incompatible with restriction: = 2.2.7
      ounit2.2.2.3: Incompatible with restriction: = 2.2.7
      ...
- sexplib -> sexplib.111.25.00
    ezjsonm 0.3.1 requires < 113.01.00
- type_conv -> type_conv.111.13.00
    sexplib 111.25.00 requires not(> 111.13.00)
- ocaml|ocaml&ocamlfind-secondary -> (problem)
    Rejected candidates:
      ocaml: Requires ocaml >= 4.08
      ocaml&ocamlfind-secondary: Requires ocaml >= 4.02 & < 4.08~~