Package ocaml

Failed to find a solution:

no platform:
2026-02-27 11:49.44 [INFO] Solving for ocaml-base-compiler,
                           ocaml, constraints ocaml-base-compiler<=5.4.0,
                           ocaml=5.6.0 using opam_repository_commit d6d1ae33b054cb03833ed1ed1abe7f0b0f8ab54a

2026-02-27 11:50.18 [INFO] base: eliminated all possibilities in 0.11 s

2026-02-27 11:50.18 [INFO] = base =

2026-02-27 11:50.18 [INFO] Can't find all required versions.
Selected: ocaml&ocaml-base-compiler ocaml-base-compiler
- ocaml -> ocaml.5.6.0
    User requested = 5.6.0
- ocaml-base-compiler -> (problem)
    User requested <= 5.4.0
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.6.0 & < 5.6.1~
    Rejected candidates:
      ocaml-base-compiler.5.4.0: Incompatible with restriction: >= 5.6.0 & < 5.6.1~
      ocaml-base-compiler.5.4.0~rc1: Incompatible with restriction: >= 5.6.0 & < 5.6.1~
      ocaml-base-compiler.5.4.0~beta2: Incompatible with restriction: >= 5.6.0 & < 5.6.1~
      ocaml-base-compiler.5.4.0~beta1: Incompatible with restriction: >= 5.6.0 & < 5.6.1~
      ocaml-base-compiler.5.4.0~alpha1: Incompatible with restriction: >= 5.6.0 & < 5.6.1~
      ...