Package ojs-base

Failed to find a solution:

no platform:
2024-05-29 15:02.55 [INFO] Solving for ocaml-base-compiler, ocaml,
                           ojs-base using opam_repository_commit 7311123dcaba6b163a96ad2219b8cc4e59df93a3

2024-05-29 15:03.02 [INFO] base: eliminated all possibilities in 2.94 s

2024-05-29 15:03.02 [INFO] = base =

2024-05-29 15:03.02 [INFO] Can't find all required versions.
Selected: astring.0.8.3 base-bytes.base base-ocamlbuild.base
          base-threads.base base-unix.base biniou.1.2.2 camlp-streams.5.0.1
          camlp4.4.02.0-1modular-implicits cmdliner.1.0.2 conf-which.1
          cppo.1.6.9 cppo_ocamlbuild.1.6.9 dune.3.15.3 easy-format.1.3.2
          magic-mime.1.0.0 ocaml-config.3 ocaml-secondary-compiler.4.08.1-1
          ocamlfind.1.9.6 ocamlfind-secondary.1.9.6 ocplib-endian.1.1
          topkg.1.0.0 uchar.0.0.2 websocket.2.12 xmlm.1.3.0
          ojs-base&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler ocaml&ocamlfind-secondary base-no-ppx
          base-no-ppx
- base-no-ppx -> (problem)
    Rejected candidates:
      base-no-ppx.base: Requires ocaml < 4.02.0
- base64 -> base64.2.3.0
    js_of_ocaml 2.8.4 requires >= 2.0.0 & < 3.0.0
- cohttp -> (problem)
    websocket 2.12 requires >= 1.1.0
    Rejected candidates:
      cohttp.6.0.0~beta2: Requires ocaml >= 4.08
      cohttp.6.0.0~alpha2: Requires ocaml >= 4.08
      cohttp.6.0.0~alpha1: Requires ocaml >= 4.08
      cohttp.6.0.0~alpha0: Requires base64 >= 3.1.0
      cohttp.5.3.1: Requires base64 >= 3.1.0
      ...
- js_of_ocaml -> js_of_ocaml.2.8.4
    ojs-base 0.3.0 requires >= 2.5 & < 3.0
- lwt -> lwt.3.0.0
    js_of_ocaml 2.8.4 requires >= 2.4.4 & < 4.0.0
- menhir -> menhir.20200211
    js_of_ocaml 2.8.4 requires < 20200525
- menhirLib -> menhirLib.20200211
    menhir 20200211 requires = 20200211
- menhirSdk -> menhirSdk.20200211
    menhir 20200211 requires = 20200211
- 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.5.3.0+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
      ocaml-variants.5.2.0~rc1+options: Incompatible with restriction: = 4.02.0+modular-implicits | = 4.02.1+modular-implicits-ber
      ...
- ocamlbuild -> ocamlbuild.0
    lwt 3.0.0 requires not(= 0.9.0)
- ojs-base -> ojs-base.0.3.0
    User requested = 0.3.0
- ppx_deriving_yojson -> (problem)
    ojs-base 0.3.0 requires >= 2.3
    Rejected candidates:
      ppx_deriving_yojson.3.8.0: Requires ocaml >= 4.05.0
      ppx_deriving_yojson.3.7.0: Requires ocaml >= 4.05.0
      ppx_deriving_yojson.3.6.1: Requires ocaml >= 4.05.0
      ppx_deriving_yojson.3.6.0: Requires ocaml >= 4.05.0
      ppx_deriving_yojson.3.5.3: Requires ocaml >= 4.04.0
      ...
- result -> result.1.4
    cmdliner 1.0.2 requires < 1.5
- xtmpl -> xtmpl.0.12
    ojs-base 0.3.0 requires >= 0.12 & < 0.13.0
- yojson -> yojson.1.7.0
    js_of_ocaml 2.8.4 requires < 2.0.0