Package opam-publish

Failed to find a solution:

no platform:
2026-02-04 14:33.17 [INFO] Solving for ocaml-base-compiler,
                           opam-publish, constraints ocaml-base-compiler<=5.4.0,
                           opam-publish=0.3.0+transition using opam_repository_commit 45c04602c2fc908af6d1b17ba39c7517d58cb274

2026-02-04 14:33.17 [INFO] base: eliminated all possibilities in 0.19 s

2026-02-04 14:33.17 [INFO] = base =

2026-02-04 14:33.17 [INFO] Can't find all required versions.
Selected: ocaml.5.6.0 opam-publish&ocaml-base-compiler ocaml-base-compiler
- ocaml-base-compiler -> (problem)
    User requested <= 5.4.0
    ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires = 5.6.0
    Rejected candidates:
      ocaml-base-compiler.5.4.0: Incompatible with restriction: = 5.6.0
      ocaml-base-compiler.5.4.0~rc1: Incompatible with restriction: = 5.6.0
      ocaml-base-compiler.5.4.0~beta2: Incompatible with restriction: = 5.6.0
      ocaml-base-compiler.5.4.0~beta1: Incompatible with restriction: = 5.6.0
      ocaml-base-compiler.5.4.0~alpha1: Incompatible with restriction: = 5.6.0
      ...
- opam-publish -> opam-publish.0.3.0+transition
    User requested = 0.3.0+transition
- publish -> (problem)
    Rejected candidates:
      publish.0.3.4+transition: Requires opam-publish > 0.3.4