Package core_unix

Failed to find a solution:

no platform:
2025-07-01 21:51.24 [INFO] Solving for ocaml-base-compiler, ocaml,
                           core_unix using opam_repository_commit 84d2c8f5caa2f07e0c67088f2a260a7eb0b4ab99

2025-07-01 21:51.24 [INFO] base: eliminated all possibilities in 0.17 s

2025-07-01 21:51.24 [INFO] = base =

2025-07-01 21:51.24 [INFO] Can't find all required versions.
Selected: base.v0.17.3 base-bigarray.base base-domains.base base-effects.base
          base-nnp.base base-threads.base base-unix.base
          base_bigstring.v0.17.0 base_quickcheck.v0.17.1 bin_prot.v0.17.0-1
          capitalization.v0.17.0 core.v0.17.1 core_kernel.v0.17.0 csexp.1.5.2
          dune.3.19.1 dune-configurator.3.19.1
          expect_test_helpers_core.v0.17.0 fieldslib.v0.17.0 gel.v0.17.0
          int_repr.v0.17.0 jane-street-headers.v0.17.0 jst-config.v0.17.0
          num.1.6 ocaml-compiler-libs.v0.17.0 ocaml-options-vanilla.1
          ocaml_intrinsics_kernel.v0.17.1 parsexp.v0.17.0 ppx_assert.v0.17.0
          ppx_base.v0.17.0 ppx_bench.v0.17.1 ppx_bin_prot.v0.17.1
          ppx_cold.v0.17.0 ppx_compare.v0.17.0 ppx_custom_printf.v0.17.0
          ppx_derivers.1.2.1 ppx_diff.v0.17.1
          ppx_disable_unused_warnings.v0.17.0 ppx_enumerate.v0.17.0
          ppx_expect.v0.17.3 ppx_fields_conv.v0.17.0
          ppx_fixed_literal.v0.17.0 ppx_globalize.v0.17.2 ppx_hash.v0.17.0
          ppx_here.v0.17.0 ppx_ignore_instrumentation.v0.17.0
          ppx_inline_test.v0.17.1 ppx_jane.v0.17.0 ppx_let.v0.17.1
          ppx_log.v0.17.0 ppx_module_timer.v0.17.0 ppx_optcomp.v0.17.1
          ppx_optional.v0.17.0 ppx_pipebang.v0.17.0 ppx_sexp_conv.v0.17.1
          ppx_sexp_message.v0.17.0 ppx_sexp_value.v0.17.0 ppx_stable.v0.17.1
          ppx_stable_witness.v0.17.0 ppx_string.v0.17.0
          ppx_string_conv.v0.17.0 ppx_tydi.v0.17.1 ppx_typerep_conv.v0.17.1
          ppx_variants_conv.v0.17.1 ppxlib.0.37.0~5.4preview
          ppxlib_jane.v0.17.4 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
          time_now.v0.17.0 timezone.v0.17.0 typerep.v0.17.1 uopt.v0.17.0
          variantslib.v0.17.0 core_unix&ocaml&ocaml-base-compiler
          system-mingw system-mingw|system-msvc&winpthreads ocaml
          base-domains ocaml-variants ocaml-base-compiler
- core_unix -> core_unix.v0.17.1
    User requested = v0.17.1
- ocaml -> (problem)
    User requested <= 5.0.0
    base v0.17.3 requires >= 5.1.0
    Rejected candidates:
      ocaml.5.0.0: Incompatible with restriction: >= 5.1.0
      ocaml.4.14.3: Incompatible with restriction: >= 5.1.0
      ocaml.4.14.2: Incompatible with restriction: >= 5.1.0
      ocaml.4.14.1: Incompatible with restriction: >= 5.1.0
      ocaml.4.14.0: Incompatible with restriction: >= 5.1.0
      ...
- ocaml-base-compiler -> ocaml-base-compiler.5.4.0~alpha1
    User requested >= 4.04.1
- ocaml-compiler -> ocaml-compiler.5.4.0~alpha1
    ocaml-base-compiler 5.4.0~alpha1 requires = 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
      ...
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied