Package ocaml-variants

Failed to find a solution:

no platform:
2024-12-24 15:04.21 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ocaml-variants using opam_repository_commit a66a58bdc3f82c934381148025d7ae4282c5ef1f

2024-12-24 15:04.28 [INFO] base: eliminated all possibilities in 2.63 s

2024-12-24 15:04.28 [INFO] = base =

2024-12-24 15:04.28 [INFO] Can't find all required versions.
Selected: ocaml-config.3 ocaml-options-vanilla.1
          ocaml-variants&ocaml&ocaml-base-compiler ocaml-variants
          ocaml-base-compiler ocaml-base-compiler
- ocaml -> ocaml.5.1.1
    User requested <= 5.1.1
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0~rc1
    User requested >= 4.04.1
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.3.0~rc1 requires = 5.3.0~rc1
    Rejected candidates:
      ocaml-compiler.5.3.0~rc1: Requires ocaml = 5.3.0
      ocaml-compiler.5.3.0~beta2: Incompatible with restriction: = 5.3.0~rc1
      ocaml-compiler.5.3.0~beta1: Incompatible with restriction: = 5.3.0~rc1
      ocaml-compiler.5.3.0~alpha1: Incompatible with restriction: = 5.3.0~rc1
      ocaml-compiler.5.3: Incompatible with restriction: = 5.3.0~rc1
- ocaml-variants -> (problem)
    User requested = 4.11.0+alpha2+fp+flambda
    No usable implementations:
      ocaml-variants.5.4.0+trunk: Rejected by user-specified constraint ocaml-variants (= 4.11.0+alpha2+fp+flambda)
      ocaml-variants.5.3.0+trunk: Rejected by user-specified constraint ocaml-variants (= 4.11.0+alpha2+fp+flambda)
      ocaml-variants.5.3.0~rc1+options: Rejected by user-specified constraint ocaml-variants (= 4.11.0+alpha2+fp+flambda)
      ocaml-variants.5.3.0~beta2+options: Rejected by user-specified constraint ocaml-variants (= 4.11.0+alpha2+fp+flambda)
      ocaml-variants.5.3.0~beta1+options: Rejected by user-specified constraint ocaml-variants (= 4.11.0+alpha2+fp+flambda)
      ...