Package websocket-async

Failed to find a solution:

no platform:
2025-05-16 17:36.54 [INFO] Solving for ocaml-base-compiler,
                           websocket-async, constraints ocaml-base-compiler<=5.3.0,
                           websocket-async=2.11 using opam_repository_commit cf409d95af00ff822422bd76b657ed213b661401

2025-05-16 17:36.55 [INFO] base: eliminated all possibilities in 0.57 s

2025-05-16 17:36.55 [INFO] = base =

2025-05-16 17:36.55 [INFO] Can't find all required versions.
Selected: angstrom.0.16.1 astring.0.8.5 async.v0.17.0 async_kernel.v0.17.0
          async_log.v0.17.0 async_rpc_kernel.v0.17.0 async_ssl.v0.17.0-1
          async_unix.v0.17.0 base.v0.17.2 base-bytes.base base-threads.base
          base-unix.base base_quickcheck.v0.17.0 bigarray-compat.1.1.0
          bigstringaf.0.10.0 bin_prot.v0.17.0 capitalization.v0.17.0
          cohttp-async.6.0.0 conf-libffi.2.0.0 conf-libssl.4
          conf-pkg-config.4 core_kernel.v0.17.0 core_unix.v0.17.1 cppo.1.8.0
          csexp.1.5.2 cstruct.6.2.0 ctypes.0.23.0 ctypes-foreign.0.23.0
          domain-name.0.4.1 dune-configurator.3.18.2
          expect_test_helpers_core.v0.17.0 fieldslib.v0.17.0 fmt.0.10.0
          gel.v0.17.0 int_repr.v0.17.0 integers.0.7.0 ipaddr.5.6.0
          jane-street-headers.v0.17.0 jbuilder.transition jst-config.v0.17.0
          logs.0.8.0 macaddr.5.6.0 magic-mime.1.3.1 num.1.5-1 ocaml.5.5.0
          ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0
          ocaml_intrinsics_kernel.v0.17.1 ocamlbuild.0.16.1 ocamlfind.1.9.8
          ocplib-endian.1.2 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_disable_unused_warnings.v0.17.0 ppx_enumerate.v0.17.0
          ppx_expect.v0.17.2 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_jane.v0.17.2
          protocol_version_header.v0.17.0 re.1.12.0 seq.base
          sexp_pretty.v0.17.0 sexplib.v0.17.0 sexplib0.v0.17.0 spawn.v0.17.0
          splittable_random.v0.17.0 stdio.v0.17.0 stdlib-shims.0.3.0
          stringext.1.6.0 textutils.v0.17.0 time_now.v0.17.0 timezone.v0.17.0
          topkg.1.0.8 typerep.v0.17.1 uopt.v0.17.0 uri.4.4.0 uri-sexp.4.4.0
          uutf.1.0.4 variantslib.v0.17.0 websocket-async&ocaml-base-compiler
          ocaml-variants ocaml-base-compiler ocaml-base-compiler
- base64 -> base64.2.3.0
    websocket 2.10 requires >= 2.2.0 & < 3.0.0
- cohttp -> (problem)
    Rejected candidates:
      cohttp.6.1.0: Requires http = 6.1.0
      cohttp.6.0.0: Requires base64 >= 3.1.0
      cohttp.6.0.0~beta2: Requires http = 6.0.0~beta2
      cohttp.6.0.0~alpha2: Requires http = 6.0.0~alpha2
      cohttp.6.0.0~alpha1: Requires http = 6.0.0~alpha1
      ...
- conduit-async -> (problem)
    cohttp-async 6.0.0 requires >= 1.2.0
    websocket-async 2.11 requires <= 1.1.0
    Rejected candidates:
      conduit-async.8.0.0: Incompatible with restriction: <= 1.1.0
      conduit-async.7.1.0: Incompatible with restriction: <= 1.1.0
      conduit-async.7.0.0: Incompatible with restriction: <= 1.1.0
      conduit-async.6.2.3: Incompatible with restriction: <= 1.1.0
      conduit-async.6.2.2: Incompatible with restriction: <= 1.1.0
      ...
- core -> (problem)
    async v0.17.0 requires >= v0.17 & < v0.18
    websocket-async 2.11 requires < v0.13.0
    Rejected candidates:
      core.v0.17.1: Incompatible with restriction: < v0.13.0
      core.v0.17.0: Requires ocaml >= 5.1.0 & < 5.2
      core.v0.16.2: Incompatible with restriction: >= v0.17 & < v0.18
      core.v0.16.1: Incompatible with restriction: >= v0.17 & < v0.18
      core.v0.16.0: Incompatible with restriction: >= v0.17 & < v0.18
      ...
- dune -> (problem)
    angstrom 0.16.1 requires >= 1.8
    async v0.17.0 requires >= 3.11.0
    Rejected candidates:
      dune.3.18.2: Requires jbuilder not(= transition)
      dune.3.18.1: Requires jbuilder not(= transition)
      dune.3.18.0: Requires jbuilder not(= transition)
      dune.3.17.2: Requires jbuilder not(= transition)
      dune.3.17.1: Requires jbuilder not(= transition)
      ...
- http -> http.6.0.0
    cohttp-async 6.0.0 requires = 6.0.0
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0
    User requested <= 5.3.0
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.3.0 requires = 5.3.0
    Rejected candidates:
      ocaml-compiler.5.5: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.4: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0: Requires ocaml = 5.3.0
      ocaml-compiler.5.3.0~rc1: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0~beta2: Incompatible with restriction: = 5.3.0
      ...
- ocaml-variants -> (problem)
    Rejected candidates:
      ocaml-variants.5.5.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.4.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.1+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.0+options: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.0+BER: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ...
- ppxlib -> (problem)
    base_quickcheck v0.17.0 requires >= 0.28.0 & < 0.36.0
    Rejected candidates:
      ppxlib.0.36.0: Incompatible with restriction: >= 0.28.0 & < 0.36.0
      ppxlib.0.35.0: Requires ocaml >= 4.08.0 & < 5.4.0
      ppxlib.0.34.0: Requires ocaml >= 4.04.1 & < 5.4.0
      ppxlib.0.33.0: Requires ocaml >= 4.04.1 & < 5.3.0
      ppxlib.0.32.1: Requires ocaml >= 4.04.1 & < 5.3.0
      ...
- websocket -> websocket.2.10
    websocket-async 2.11 requires = 2.10
- websocket-async -> websocket-async.2.11
    User requested = 2.11