Package conf-pic-switch

Failed to find a solution:

no platform:
2025-03-07 02:40.51 [INFO] Solving for ocaml-base-compiler, ocaml,
                           conf-pic-switch using opam_repository_commit 8707d628f2beb80e7f60b89d60c33bdf2ffd9026

2025-03-07 02:40.52 [INFO] base: eliminated all possibilities in 0.44 s

2025-03-07 02:40.52 [INFO] = base =

2025-03-07 02:40.52 [INFO] Can't find all required versions.
Selected: conf-bash.1 ocaml-config.3 ocaml-options-vanilla.1
          conf-pic-switch&ocaml&ocaml-base-compiler ocaml-variants
          ocaml-base-compiler ocaml-base-compiler
- conf-pic-switch -> conf-pic-switch.0.1
    User requested = 0.1
- ocaml -> ocaml.4.02.1
    User requested <= 5.0.0
    conf-pic-switch 0.1 requires >= 4.01.0 & < 4.02.2
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0
    User requested >= 4.04.1
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.3.0 requires = 5.3.0
    Rejected candidates:
      ocaml-compiler.5.3.0: Requires ocaml = 5.3.0
      ocaml-compiler.5.3.0~rc1: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0~beta2: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0~beta1: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.3.0~alpha1: Incompatible with restriction: = 5.3.0
      ...
- 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
      ...