Package cpdf

Failed to find a solution:

no platform:
2024-09-12 08:30.47 [INFO] Solving for ocaml-base-compiler, ocaml,
                           cpdf using opam_repository_commit 0329818dcfd3de1a722ea09eeeed94cd24caa375

2024-09-12 08:30.55 [INFO] base: eliminated all possibilities in 3.60 s

2024-09-12 08:30.55 [INFO] = base =

2024-09-12 08:30.55 [INFO] Can't find all required versions.
Selected: base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base host-arch-x86_64.1 ocaml-config.3
          ocaml-options-vanilla.1 ocamlfind.1.9.6
          cpdf&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler system-mingw ocaml base-domains
          ocaml-base-compiler
- camlpdf -> (problem)
    cpdf 1.7 requires < 2.1
    Rejected candidates:
      camlpdf.2.7.1: Incompatible with restriction: < 2.1
      camlpdf.2.7: Incompatible with restriction: < 2.1
      camlpdf.2.6: Incompatible with restriction: < 2.1
      camlpdf.2.5.3: Incompatible with restriction: < 2.1
      camlpdf.2.5: Requires ocaml >= 4.10 & < 5.0
      ...
- cpdf -> cpdf.1.7
    User requested = 1.7
- ocaml -> ocaml.5.1.1
    User requested <= 5.1.1
- ocaml-base-compiler -> ocaml-base-compiler.5.1.1
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.1~ & < 5.1.2~
- system-mingw -> (problem)
    No usable implementations:
      system-mingw.1: Availability condition not satisfied