Package cohttp-async

Failed to find a solution:

no platform:
2025-07-06 13:43.52 [INFO] Solving for ocaml-base-compiler, ocaml,
                           cohttp-async using opam_repository_commit bd82a8dde3f816d8b45ecbe005ac1f8e7f25c207

2025-07-06 13:44.18 [INFO] base: eliminated all possibilities in 0.19 s

2025-07-06 13:44.18 [INFO] = base =

2025-07-06 13:44.18 [INFO] Can't find all required versions.
Selected: angstrom.0.16.1 astring.0.8.5 async.v0.16.0 base-threads.base
          base-unix.base base64.3.5.1 bigstringaf.0.10.0 cohttp.6.1.1
          conduit.8.0.0 conduit-async.8.0.0 csexp.1.5.2 domain-name.0.4.1
          dune.3.19.1 dune-configurator.3.19.1 fmt.0.10.0 http.6.1.1
          ipaddr.5.6.0 ipaddr-sexp.5.6.0 logs.0.8.0 macaddr.5.6.0
          magic-mime.1.3.1 num.1.6 ocaml-compiler-libs.v0.12.4 ocaml-config.3
          ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocamlbuild.0.16.1
          ocamlfind.1.9.8 ppx_derivers.1.2.1 re.1.13.2 seq.base spawn.v0.17.0
          stdlib-shims.0.3.0 stringext.1.6.0 topkg.1.0.8 uri.4.4.0
          uri-sexp.4.4.0 uutf.1.0.4 cohttp-async&ocaml&ocaml-base-compiler
          ocaml-variants ocaml-base-compiler ocaml-base-compiler
- async_kernel -> (problem)
    async v0.16.0 requires >= v0.16 & < v0.17
    cohttp-async 6.1.1 requires >= v0.17.0
    Rejected candidates:
      async_kernel.v0.17.0: Incompatible with restriction: >= v0.16 & < v0.17
      async_kernel.v0.16.0: Incompatible with restriction: >= v0.17.0
      async_kernel.v0.15.0: Incompatible with restriction: >= v0.16 & < v0.17
      async_kernel.v0.14.0: Incompatible with restriction: >= v0.16 & < v0.17
      async_kernel.v0.13.0: Incompatible with restriction: >= v0.16 & < v0.17
      ...
- async_rpc_kernel -> async_rpc_kernel.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- async_unix -> async_unix.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- base -> base.v0.16.4
    base_bigstring v0.16.0 requires >= v0.16 & < v0.17
- base_bigstring -> base_bigstring.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- base_quickcheck -> base_quickcheck.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- bin_prot -> bin_prot.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- cohttp-async -> cohttp-async.6.1.1
    User requested = 6.1.1
- core -> core.v0.16.2
    async v0.16.0 requires >= v0.16 & < v0.17
- core_kernel -> core_kernel.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- core_unix -> core_unix.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- expect_test_helpers_core -> expect_test_helpers_core.v0.16.0
    core_unix v0.16.0 requires >= v0.16 & < v0.17
- fieldslib -> fieldslib.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- int_repr -> int_repr.v0.16.0
    base_bigstring v0.16.0 requires >= v0.16 & < v0.17
- jane-street-headers -> jane-street-headers.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- jst-config -> jst-config.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- ocaml -> ocaml.5.0.0
    User requested <= 5.0.0
- ocaml-base-compiler -> ocaml-base-compiler.5.4.0~alpha1
    User requested >= 4.04.1
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.4.0~alpha1 requires = 5.4.0~alpha1
    Rejected candidates:
      ocaml-compiler.5.5: Incompatible with restriction: = 5.4.0~alpha1
      ocaml-compiler.5.4.0~alpha1: Requires ocaml = 5.4.0
      ocaml-compiler.5.4: Incompatible with restriction: = 5.4.0~alpha1
      ocaml-compiler.5.3.0: Incompatible with restriction: = 5.4.0~alpha1
      ocaml-compiler.5.3.0~rc1: Incompatible with restriction: = 5.4.0~alpha1
      ...
- 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.5.4.0~alpha1+options: 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_intrinsics -> ocaml_intrinsics.v0.16.2
    core_unix v0.16.0 requires >= v0.16 & < v0.17
- parsexp -> parsexp.v0.16.0
    sexplib v0.16.0 requires >= v0.16 & < v0.17
- ppx_assert -> ppx_assert.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- ppx_base -> ppx_base.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- ppx_bench -> ppx_bench.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_bin_prot -> ppx_bin_prot.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_cold -> ppx_cold.v0.16.0
    ppx_assert v0.16.0 requires >= v0.16 & < v0.17
- ppx_compare -> ppx_compare.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppx_custom_printf -> ppx_custom_printf.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppx_disable_unused_warnings -> ppx_disable_unused_warnings.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_enumerate -> ppx_enumerate.v0.16.0
    ppx_base v0.16.0 requires >= v0.16 & < v0.17
- ppx_expect -> ppx_expect.v0.16.1
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_fields_conv -> ppx_fields_conv.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- ppx_fixed_literal -> ppx_fixed_literal.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_globalize -> ppx_globalize.v0.16.0
    ppx_base v0.16.0 requires >= v0.16 & < v0.17
- ppx_hash -> ppx_hash.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- ppx_here -> ppx_here.v0.16.0
    ppx_assert v0.16.0 requires >= v0.16 & < v0.17
- ppx_ignore_instrumentation -> ppx_ignore_instrumentation.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_inline_test -> ppx_inline_test.v0.16.1
    core v0.16.2 requires >= v0.16 & < v0.17
- ppx_jane -> ppx_jane.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- ppx_let -> ppx_let.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- ppx_log -> ppx_log.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- ppx_module_timer -> ppx_module_timer.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_optcomp -> ppx_optcomp.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppx_optional -> ppx_optional.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_pipebang -> ppx_pipebang.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_sexp_conv -> ppx_sexp_conv.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppx_sexp_message -> ppx_sexp_message.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- ppx_sexp_value -> ppx_sexp_value.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- ppx_stable -> ppx_stable.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_stable_witness -> ppx_stable_witness.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppx_string -> ppx_string.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_tydi -> ppx_tydi.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_typerep_conv -> ppx_typerep_conv.v0.16.0
    ppx_jane v0.16.0 requires >= v0.16 & < v0.17
- ppx_variants_conv -> ppx_variants_conv.v0.16.0
    bin_prot v0.16.0 requires >= v0.16 & < v0.17
- ppxlib -> ppxlib.0.35.0
    base_quickcheck v0.16.0 requires >= 0.28.0 & < 0.36.0
- protocol_version_header -> protocol_version_header.v0.16.0
    async_rpc_kernel v0.16.0 requires >= v0.16 & < v0.17
- sexp_pretty -> sexp_pretty.v0.16.0
    expect_test_helpers_core v0.16.0 requires >= v0.16 & < v0.17
- sexplib -> sexplib.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- sexplib0 -> sexplib0.v0.16.0
    base v0.16.4 requires >= v0.16 & < v0.17
- splittable_random -> splittable_random.v0.16.0
    base_quickcheck v0.16.0 requires >= v0.16 & < v0.17
- stdio -> stdio.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- textutils -> textutils.v0.16.0
    async v0.16.0 requires >= v0.16 & < v0.17
- textutils_kernel -> textutils_kernel.v0.16.0
    textutils v0.16.0 requires >= v0.16 & < v0.17
- time_now -> time_now.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- timezone -> timezone.v0.16.0
    core_unix v0.16.0 requires >= v0.16 & < v0.17
- typerep -> typerep.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17
- variantslib -> variantslib.v0.16.0
    core v0.16.2 requires >= v0.16 & < v0.17