Package ocaml-index

Failed to find a solution:

no platform:
2025-01-11 18:27.42 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ocaml-index using opam_repository_commit 84f0fe59c54c014ec00b31a1f0699ac6371b3498

2025-01-11 18:30.00 [INFO] base: eliminated all possibilities in 2.27 s

2025-01-11 18:30.00 [INFO] = base =

2025-01-11 18:30.00 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-effects.base
          base-nnp.base base-threads.base base-unix.base csexp.1.5.2
          dune.3.17.1 merlin-lib.5.4-503 ocaml-compiler.5.3.0
          ocaml-options-vanilla.1 ocaml-index&ocaml&ocaml-base-compiler ocaml
          system-mingw system-mingw|system-msvc&winpthreads ocaml
          base-domains ocaml-variants ocaml-base-compiler
- ocaml -> (problem)
    User requested <= 5.1.1
    csexp 1.5.2 requires >= 4.03.0
    merlin-lib 5.4-503 requires >= 5.3 & < 5.4
    Rejected candidates:
      ocaml.5.1.1: Incompatible with restriction: >= 5.3 & < 5.4
      ocaml.5.1.0: Incompatible with restriction: >= 5.3 & < 5.4
      ocaml.5.0.1: Incompatible with restriction: >= 5.3 & < 5.4
      ocaml.5.0.0: Incompatible with restriction: >= 5.3 & < 5.4
      ocaml.4.14.3: Incompatible with restriction: >= 5.3 & < 5.4
      ...
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0
    User requested >= 4.04.1
- ocaml-index -> ocaml-index.5.4-503
    User requested = 5.4-503
- ocaml-variants -> (problem)
    Rejected candidates:
      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~rc1+options: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ocaml-variants.5.3.0~beta2+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