Package orocksdb

Failed to find a solution:

no platform:
2025-05-16 17:30.21 [INFO] Solving for ocaml-base-compiler,
                           orocksdb, constraints ocaml-base-compiler<=5.3.0,
                           orocksdb=0.2.1 using opam_repository_commit cf409d95af00ff822422bd76b657ed213b661401

2025-05-16 17:30.22 [INFO] base: eliminated all possibilities in 0.58 s

2025-05-16 17:30.22 [INFO] = base =

2025-05-16 17:30.22 [INFO] Can't find all required versions.
Selected: base-threads.base base-unix.base bigarray-compat.1.1.0
          conf-libffi.2.0.0 conf-pkg-config.4 conf-rocksdb.1 csexp.1.5.2
          ctypes.0.23.0 ctypes-foreign.0.23.0 dune.3.18.2
          dune-configurator.3.18.2 integers.0.7.0 ocaml.5.5.0 ocaml-config.3
          ocaml-options-vanilla.1 ocamlbuild.0.16.1 ocamlfind.1.9.8
          stdlib-shims.0.3.0 orocksdb&ocaml-base-compiler ocaml-variants
          ocaml-base-compiler ocaml-base-compiler
- depext -> (problem)
    No usable implementations:
      depext.transition: Availability condition not satisfied
      depext.1.0.5: Availability condition not satisfied
      depext.1.0.4: Availability condition not satisfied
      depext.1.0.3: Availability condition not satisfied
      depext.1.0.1: Availability condition not satisfied
      ...
- 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
      ...
- orocksdb -> orocksdb.0.2.1
    User requested = 0.2.1