Package ocaml-lsp-server

Failed to find a solution:

no platform:
2025-06-12 08:59.17 [INFO] Solving for ocaml-base-compiler,
                           ocaml-lsp-server, constraints ocaml-base-compiler<=5.3.0,
                           ocaml-lsp-server=1.22.1~5.4preview using opam_repository_commit 391f82e9da01a13ff4ca7414df22df13c440bd0e

2025-06-12 08:59.18 [INFO] base: eliminated all possibilities in 0.61 s

2025-06-12 08:59.18 [INFO] = base =

2025-06-12 08:59.18 [INFO] Can't find all required versions.
Selected: astring.0.8.5 base.v0.17.2 base-threads.base base-unix.base
          camlp-streams.5.0.1 chrome-trace.3.19.0 csexp.1.5.2 dune.3.19.0
          dune-build-info.3.19.0 dune-configurator.3.19.0 dune-rpc.3.19.0
          dyn.3.19.0 fiber.3.7.0 jsonrpc.1.22.0 merlin-lib.5.4.2~5.4preview
          ocaml-config.3 ocaml-options-vanilla.1
          ocaml_intrinsics_kernel.v0.17.1 ocamlbuild.0.16.1 ocamlc-loc.3.19.0
          ocamlfind.1.9.8 ocamlformat-rpc-lib.0.27.0 ordering.3.19.0 pp.2.0.0
          ppx_yojson_conv_lib.v0.17.0 re.1.12.0 seq.base sexplib0.v0.17.0
          spawn.v0.17.0 stdune.3.19.0 topkg.1.0.8 xdg.3.19.0 yojson.3.0.0
          ocaml-lsp-server&ocaml-base-compiler ocaml-variants
          ocaml-base-compiler ocaml-base-compiler
- lsp -> (problem)
    Rejected candidates:
      lsp.1.22.0: Requires yojson < 3
      lsp.1.21.0: Requires jsonrpc = 1.21.0
      lsp.1.20.1: Requires jsonrpc = 1.20.1
      lsp.1.20.0: Requires jsonrpc = 1.20.0
      lsp.1.19.0: Requires jsonrpc = 1.19.0
      ...
- ocaml -> ocaml.5.4.0
    merlin-lib 5.4.2~5.4preview requires >= 5.4 & < 5.5
- 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.5.4.0~alpha1: 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-lsp-server -> ocaml-lsp-server.1.22.1~5.4preview
    User requested = 1.22.1~5.4preview
- 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.5.4.0~alpha1+options: 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
      ...