Package pa_do

Failed to find a solution:

no platform:
2024-01-29 15:02.59 [INFO] Solving for ocaml-base-compiler, ocaml,
                           pa_do using opam_repository_commit 251c5edf2ecdd2541c324dacb931c3606ee71eeb

2024-01-29 15:03.05 [INFO] base: eliminated all possibilities in 2.80 s

2024-01-29 15:03.05 [INFO] = base =

2024-01-29 15:03.05 [INFO] Can't find all required versions.
Selected: base-ocamlbuild.base ocaml-config.3 ocamlbuild.0 ocamlfind.1.9.6
          pa_do&ocaml&ocaml-base-compiler ocaml-base-compiler
          ocaml-base-compiler
- ocaml -> ocaml.4.01.0
    User requested <= 5.1.0
    base-ocamlbuild base requires >= 3.10 & < 4.03
    pa_do 0.8.15 requires <= 4.01.0
- 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
      ...
- pa_do -> pa_do.0.8.15
    User requested = 0.8.15