Package opium

Failed to find a solution:

no platform:
2024-05-29 14:57.38 [INFO] Solving for ocaml-base-compiler, ocaml,
                           opium using opam_repository_commit 7311123dcaba6b163a96ad2219b8cc4e59df93a3

2024-05-29 14:57.45 [INFO] base: eliminated all possibilities in 3.51 s

2024-05-29 14:57.45 [INFO] = base =

2024-05-29 14:57.45 [INFO] Can't find all required versions.
Selected: base.v0.17.0 base-bigarray.base base-bytes.base base-domains.base
          base-nnp.base base-threads.base base-unix.base
          base_bigstring.v0.17.0 base_quickcheck.v0.17.0 bin_prot.v0.17.0
          capitalization.v0.17.0 cmdliner.1.3.0 core.v0.17.1
          core_kernel.v0.17.0 cppo.1.6.9 csexp.1.5.2 cstruct.6.2.0
          dune.3.15.3 dune-configurator.3.15.3 ezjsonm.1.3.0 fmt.0.9.0
          gel.v0.17.0 hex.1.5.0 int_repr.v0.17.0 jane-street-headers.v0.17.0
          jsonm.1.0.2 jst-config.v0.17.0 lwt.5.7.0 magic-mime.1.3.1 num.1.5
          ocaml-compiler-libs.v0.12.4 ocaml-config.3 ocaml-options-vanilla.1
          ocaml_intrinsics_kernel.v0.17.0 ocamlbuild.0.14.3 ocamlfind.1.9.6
          ocplib-endian.1.2 omake.0.10.6 parsexp.v0.17.0 ppx_assert.v0.17.0
          ppx_base.v0.17.0 ppx_bench.v0.17.0 ppx_bin_prot.v0.17.0
          ppx_cold.v0.17.0 ppx_compare.v0.17.0 ppx_custom_printf.v0.17.0
          ppx_derivers.1.2.1 ppx_diff.v0.17.0
          ppx_disable_unused_warnings.v0.17.0 ppx_enumerate.v0.17.0
          ppx_expect.v0.17.0 ppx_fields_conv.v0.17.0
          ppx_fixed_literal.v0.17.0 ppx_globalize.v0.17.0 ppx_hash.v0.17.0
          ppx_here.v0.17.0 ppx_ignore_instrumentation.v0.17.0
          ppx_inline_test.v0.17.0 ppx_jane.v0.17.0 ppx_let.v0.17.0
          ppx_log.v0.17.0 ppx_module_timer.v0.17.0 ppx_optcomp.v0.17.0
          ppx_optional.v0.17.0 ppx_pipebang.v0.17.0 ppx_sexp_conv.v0.17.0
          ppx_sexp_message.v0.17.0 ppx_sexp_value.v0.17.0 ppx_stable.v0.17.0
          ppx_stable_witness.v0.17.0 ppx_string.v0.17.0
          ppx_string_conv.v0.17.0 ppx_tydi.v0.17.0 ppx_typerep_conv.v0.17.0
          ppx_variants_conv.v0.17.0 ppxlib.0.32.1 ppxlib_jane.v0.17.0
          re.1.11.0 seq.base sexplib.v0.17.0 sexplib0.v0.17.0
          splittable_random.v0.17.0 stdio.v0.17.0 stdlib-shims.0.3.0
          time_now.v0.17.0 topkg.1.0.7 typerep.v0.17.0 uopt.v0.17.0
          uutf.1.0.3 variantslib.v0.17.0 opium&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler ocaml base-domains ocaml
          ocaml-base-compiler
- base64 -> base64.2.3.0
    opium 0.14.0 requires >= 2.0.0 & < 3.0.0
- cohttp -> (problem)
    Rejected candidates:
      cohttp.6.0.0~beta2: Requires base64 >= 3.1.0
      cohttp.6.0.0~alpha2: Requires base64 >= 3.1.0
      cohttp.6.0.0~alpha1: Requires base64 >= 3.1.0
      cohttp.6.0.0~alpha0: Requires base64 >= 3.1.0
      cohttp.5.3.1: Requires base64 >= 3.1.0
      ...
- cow -> (problem)
    opium 0.14.0 requires >= 0.10.0 & < 2.0.0
    Rejected candidates:
      cow.2.5.0: Incompatible with restriction: >= 0.10.0 & < 2.0.0
      cow.2.4.0: Incompatible with restriction: >= 0.10.0 & < 2.0.0
      cow.2.3.0: Incompatible with restriction: >= 0.10.0 & < 2.0.0
      cow.2.2.0: Requires ocaml >= 4.02.3 & < 5.0
      cow.2.0.1: Incompatible with restriction: >= 0.10.0 & < 2.0.0
      ...
- fieldslib -> (problem)
    core v0.17.1 requires >= v0.17 & < v0.18
    opium 0.14.0 requires <= 113.00.00
    Rejected candidates:
      fieldslib.v0.17.0: Incompatible with restriction: <= 113.00.00
      fieldslib.v0.16.0: Incompatible with restriction: >= v0.17 & < v0.18
      fieldslib.v0.15.0: Incompatible with restriction: >= v0.17 & < v0.18
      fieldslib.v0.14.0: Incompatible with restriction: >= v0.17 & < v0.18
      fieldslib.v0.13.0: Incompatible with restriction: >= v0.17 & < v0.18
      ...
- 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~
- opium -> opium.0.14.0
    User requested = 0.14.0