Package ezjsonm

Failed to find a solution:

no platform:
2024-01-29 14:43.59 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ezjsonm using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 14:44.06 [INFO] base: eliminated all possibilities in 2.99 s

2024-01-29 14:44.06 [INFO] = base =

2024-01-29 14:44.06 [INFO] Can't find all required versions.
Selected: base-bytes.base base-ocamlbuild.base base-threads.base
          base-unix.base cppo.1.6.9 dune.3.13.0 hex.1.3.0 jsonm.1.0.1
          ocaml-config.3 ocaml-secondary-compiler.4.08.1-1 ocamlbuild.0
          ocamlfind.1.9.6 ocamlfind-secondary.1.9.6 ocplib-endian.1.1
          result.1.5 sexplib.113.24.00 topkg.1.0.0 uchar.0.0.2 uutf.1.0.2
          ezjsonm&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml&ocamlfind-secondary
- cstruct -> cstruct.3.0.2
    hex 1.3.0 requires >= 1.7.0 & < 5.0.0
- ezjsonm -> ezjsonm.0.4.2
    User requested = 0.4.2
- jbuilder -> jbuilder.1.0+beta20.2
    dune 3.13.0 requires not(= transition)
- ocaml -> ocaml.4.02.4
    User requested <= 5.1.0
    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
      ...