Package otr

Failed to find a solution:

no platform:
2024-09-12 08:05.35 [INFO] Solving for ocaml-base-compiler, ocaml,
                           otr using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:05.42 [INFO] base: eliminated all possibilities in 2.99 s

2024-09-12 08:05.42 [INFO] = base =

2024-09-12 08:05.42 [INFO] Can't find all required versions.
Selected: astring.0.8.3 base-bytes.base base-ocamlbuild.base
          base-threads.base base-unix.base camlp4.4.02.0-1modular-implicits
          conf-gmp.4 conf-perl.2 conf-time.1 conf-which.1 cppo.1.7.0
          dune.3.16.0 host-arch-x86_64.1 mirage-no-xen.1 ocaml-config.3
          ocaml-secondary-compiler.4.14.2 ocamlbuild.0 ocamlfind.1.9.6
          ocamlfind-secondary.1.9.6 ocplib-endian.1.1 result.1.5 topkg.1.0.0
          type_conv.113.00.02 zarith.1.11 otr&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler system-mingw
          system-mingw|system-msvc ocaml&ocamlfind-secondary mirage-no-xen
- cstruct -> cstruct.1.9.0
    nocrypto 0.5.2 requires >= 1.6.0 & < 3.0.0
    otr 0.3.0 requires >= 1.6.0 & < 2.0.0
- nocrypto -> nocrypto.0.5.2
    otr 0.3.0 requires >= 0.5.0 & < 0.5.3
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.1
    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.5.2.0: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~rc1: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~beta2: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~beta1: Requires ocaml = 5.2.0
      ocaml-base-compiler.5.2.0~alpha1: Requires ocaml = 5.2.0
      ...
- ocaml-variants -> (problem)
    camlp4 4.02.0-1modular-implicits requires = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
    Rejected candidates:
      ocaml-variants.5.4.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.3.0+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.1+trunk: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+statmemprof: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ocaml-variants.5.2.0+options: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ...
- otr -> otr.0.3.0
    User requested = 0.3.0
- sexplib -> sexplib.113.00.00
    nocrypto 0.5.2 requires < 113.01.00
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied