Package otr

Failed to find a solution:

no platform:
2024-01-29 14:52.00 [INFO] Solving for ocaml-base-compiler, ocaml,
                           otr using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:52.05 [INFO] base: eliminated all possibilities in 2.63 s

2024-01-29 14:52.05 [INFO] = base =

2024-01-29 14:52.05 [INFO] Can't find all required versions.
Selected: astring.0.8.3 base-bytes.base base-ocamlbuild.base
          base-threads.base base-unix.base cppo.1.6.9 jbuilder.transition
          ocaml-config.3 ocamlbuild.0 ocamlfind.1.9.6 ocplib-endian.1.1
          ppx_cstruct.3.0.2 ppx_derivers.1.2.1 ppx_deriving.4.5-1
          ppx_tools.5.0+4.02.0 ppx_tools_versioned.5.4.0 result.1.5
          topkg.1.0.0 otr&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- cstruct -> cstruct.3.0.2
    ppx_cstruct 3.0.2 requires = 3.0.2
- dune -> dune.1.11.4
    jbuilder transition requires < 2.0
- nocrypto -> (problem)
    Rejected candidates:
      nocrypto.0.5.4-2: Requires ppx_sexp_conv >= 113.33.01 & <> v0.11.0
      nocrypto.0.5.4-1: Requires ppx_sexp_conv >= 113.33.01 & <> v0.11.0
      nocrypto.0.5.4: Requires ppx_sexp_conv >= 113.33.01 & < v0.11.0
      nocrypto.0.5.3: Requires cstruct >= 1.6.0 & < 3.0.0
      nocrypto.0.5.2: Requires cstruct >= 1.6.0 & < 3.0.0
      ...
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.0
    astring 0.8.3 requires >= 4.01.0 & < 4.12.0
    base-ocamlbuild base requires >= 3.10 & < 4.03
- 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
      ...
- ocaml-migrate-parsetree -> ocaml-migrate-parsetree.1.8.0
    ppx_cstruct 3.0.2 requires < 2.0.0
- otr -> otr.0.3.1
    User requested = 0.3.1
- ppx_core -> ppx_core.113.24.00
    ppx_sexp_conv 113.24.00 requires >= 113.24.00 & < 113.25.00
- ppx_sexp_conv -> ppx_sexp_conv.113.24.00
    otr 0.3.1 requires < v0.11.0
- ppx_type_conv -> (problem)
    ppx_sexp_conv 113.24.00 requires >= 113.24.00 & < 113.25.00
    Rejected candidates:
      ppx_type_conv.v0.11.0: Incompatible with restriction: >= 113.24.00 & < 113.25.00
      ppx_type_conv.v0.10.0: Incompatible with restriction: >= 113.24.00 & < 113.25.00
      ppx_type_conv.v0.9.1: Incompatible with restriction: >= 113.24.00 & < 113.25.00
      ppx_type_conv.v0.9.0: Incompatible with restriction: >= 113.24.00 & < 113.25.00
      ppx_type_conv.113.33.03: Incompatible with restriction: >= 113.24.00 & < 113.25.00
      ...
- ppxfind -> (problem)
    Rejected candidates:
      ppxfind.1.4: Requires dune >= 2.0
      ppxfind.1.3: Requires ocaml-migrate-parsetree < 1.6.0
      ppxfind.1.2: Requires ocaml >= 4.03.0
      ppxfind.1.1: Requires ocaml >= 4.04.0
- sexplib -> sexplib.113.24.00
    otr 0.3.1 requires not(= v0.9.0)
    ppx_sexp_conv 113.24.00 requires >= 113.24.00 & < 113.25.00