Package chamo

Failed to find a solution:

no platform:
2024-09-12 07:57.52 [INFO] Solving for ocaml-base-compiler, ocaml,
                           chamo using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 07:57.59 [INFO] base: eliminated all possibilities in 3.08 s

2024-09-12 07:57.59 [INFO] = base =

2024-09-12 07:57.59 [INFO] Can't find all required versions.
Selected: base-bytes.backport base-ocamlbuild.base
          camlp4.4.02.0-1modular-implicits conf-glade.2 conf-gtk2.1
          conf-gtksourceview.2 conf-libpcre.1 conf-pkg-config.3 conf-which.1
          config-file.1.2 lablgtk-extras.1.4 ocaml-config.3 ocamlfind.1.9.6
          pcre.7.2.3 xmlm.1.2.0 chamo&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler
- chamo -> chamo.2.02
    User requested = 2.02
- lablgtk -> lablgtk.2.16.0
    chamo 2.02 requires >= 2.16.0 & < 2.18
- ocaml -> ocaml.4.01.0
    User requested <= 5.1.1
    base-bytes backport requires < 4.02.0
- 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
      ...
- ocamlbuild -> ocamlbuild.0
    pcre 7.2.3 requires <> 0.9.0