Package bt

Failed to find a solution:

no platform:
2024-01-29 15:12.45 [INFO] Solving for ocaml-base-compiler, ocaml,
                           bt using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:12.51 [INFO] base: eliminated all possibilities in 3.06 s

2024-01-29 15:12.51 [INFO] = base =

2024-01-29 15:12.51 [INFO] Can't find all required versions.
Selected: angstrom.0.16.0 base-bigarray.base base-domains.base base-nnp.base
          base-threads.base base-unix.base bigstringaf.0.9.1 bitstring.4.1.0
          cmdliner.1.2.0 conf-gmp.4 conf-gmp-powm-sec.3 conf-libssl.4
          conf-pkg-config.3 conf-zlib.1 cryptokit.1.19 csexp.1.5.2
          dune.3.13.0 dune-configurator.3.13.0 ocaml-config.3
          ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocamlbuild.0.14.3
          ocamlfind.1.9.6 ounit2.2.2.7 qcheck.0.21.3 qcheck-core.0.21.3
          qcheck-ounit.0.21.3 seq.base ssl.0.7.0 stdlib-shims.0.3.0
          stringext.1.6.0 uri.4.4.0 zarith.1.13 bt&ocaml&ocaml-base-compiler
          ocaml-base-compiler ocaml-base-compiler ocaml base-domains ocaml
          ocaml-base-compiler
- bt -> bt.0.1.2
    User requested = 0.1.2
- cohttp -> (problem)
    bt 0.1.2 requires >= 0.11.2 & < 0.99
    Rejected candidates:
      cohttp.6.0.0~beta2: Incompatible with restriction: >= 0.11.2 & < 0.99
      cohttp.6.0.0~alpha2: Incompatible with restriction: >= 0.11.2 & < 0.99
      cohttp.6.0.0~alpha1: Incompatible with restriction: >= 0.11.2 & < 0.99
      cohttp.6.0.0~alpha0: Incompatible with restriction: >= 0.11.2 & < 0.99
      cohttp.5.3.1: Incompatible with restriction: >= 0.11.2 & < 0.99
      ...
- lwt -> (problem)
    bt 0.1.2 requires < 2.4.7
    Rejected candidates:
      lwt.5.7.0: Incompatible with restriction: < 2.4.7
      lwt.5.6.1: Incompatible with restriction: < 2.4.7
      lwt.5.6.0: Incompatible with restriction: < 2.4.7
      lwt.5.5.0: Incompatible with restriction: < 2.4.7
      lwt.5.4.2: Incompatible with restriction: < 2.4.7
      ...
- ocaml -> ocaml.5.1.0
    User requested <= 5.1.0
- ocaml-base-compiler -> ocaml-base-compiler.5.1.0
    User requested >= 4.04.1
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.1.0~ & < 5.1.1~