Package domainslib

Failed to find a solution:

no platform:
2025-05-16 17:27.23 [INFO] Solving for ocaml-base-compiler,
                           domainslib, constraints ocaml-base-compiler<=5.3.0,
                           domainslib=0.3.0 using opam_repository_commit cf409d95af00ff822422bd76b657ed213b661401

2025-05-16 17:27.24 [INFO] base: eliminated all possibilities in 0.61 s

2025-05-16 17:27.24 [INFO] = base =

2025-05-16 17:27.24 [INFO] Can't find all required versions.
Selected: base-domains.base base-threads.base base-unix.base dune.3.18.2
          ocaml-config.3 ocaml-options-vanilla.1
          domainslib&ocaml-base-compiler ocaml-variants ocaml-base-compiler
          ocaml-variants ocaml-base-compiler
- domainslib -> domainslib.0.3.0
    User requested = 0.3.0
- ocaml -> ocaml.4.14.3
    domainslib 0.3.0 requires < 5.0.0
- ocaml-base-compiler -> ocaml-base-compiler.5.3.0
    User requested <= 5.3.0
- ocaml-compiler -> (problem)
    ocaml-base-compiler 5.3.0 requires = 5.3.0
    Rejected candidates:
      ocaml-compiler.5.5: Incompatible with restriction: = 5.3.0
      ocaml-compiler.5.4: Incompatible with restriction: = 5.3.0
      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-variants -> (problem)
    Rejected candidates:
      ocaml-variants.5.5.0+trunk: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      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+BER: In same conflict class (ocaml-core-compiler) as ocaml-base-compiler
      ...