Package ocaml-variants

Failed to find a solution:

no platform:
2026-02-04 14:55.53 [INFO] Solving for ocaml-base-compiler,
                           ocaml-variants, constraints ocaml-base-compiler<=5.4.0,
                           ocaml-variants=5.4.0~rc1+options using opam_repository_commit 45c04602c2fc908af6d1b17ba39c7517d58cb274

2026-02-04 14:55.54 [INFO] base: eliminated all possibilities in 0.21 s

2026-02-04 14:55.54 [INFO] = base =

2026-02-04 14:55.54 [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 ocaml-config.3
          ocaml-variants&ocaml-base-compiler system-mingw
          system-mingw|system-msvc&winpthreads ocaml-base-compiler
          base-domains ocaml ocaml ocaml-base-compiler
- ocaml -> ocaml.5.4.0
    ocaml-compiler 5.4.0~rc1 requires = 5.4.0
- ocaml-base-compiler -> (problem)
    User requested <= 5.4.0
    Rejected candidates:
      ocaml-base-compiler.5.4.0: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~rc1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~beta2: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~beta1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ocaml-base-compiler.5.4.0~alpha1: In same conflict class (ocaml-core-compiler) as ocaml-variants
      ...
- ocaml-compiler -> ocaml-compiler.5.4.0~rc1
    ocaml-variants 5.4.0~rc1+options requires = 5.4.0~rc1
- ocaml-variants -> ocaml-variants.5.4.0~rc1+options
    User requested = 5.4.0~rc1+options
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied