Package frama-c-base

Failed to find a solution:

no platform:
2024-01-29 14:56.12 [INFO] Solving for ocaml-base-compiler, ocaml,
                           frama-c-base using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:56.18 [INFO] base: eliminated all possibilities in 2.81 s

2024-01-29 14:56.18 [INFO] = base =

2024-01-29 14:56.18 [INFO] Can't find all required versions.
Selected: base-num.base num.0 ocaml-config.3 ocamlfind.1.9.6
          frama-c-base&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- frama-c-base -> frama-c-base.12.1
    User requested = 12.1
- ocaml -> ocaml.4.03.1
    User requested <= 5.1.0
    base-num base requires < 4.06.0
    frama-c-base 12.1 requires >= 4.0 & <> 4.02.0 & <> 4.02.2 & < 4.04.0
- ocaml-base-compiler -> (problem)
    User requested >= 4.04.1
    Rejected candidates:
      ocaml-base-compiler.5.1.1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.1~rc1: Requires ocaml = 5.1.1
      ocaml-base-compiler.5.1.0: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc3: Requires ocaml = 5.1.0
      ocaml-base-compiler.5.1.0~rc2: Requires ocaml = 5.1.0
      ...
- ocamlgraph -> ocamlgraph.1.8.6
    frama-c-base 12.1 requires = 1.8.5 | = 1.8.6