ocamlspot 4.07.0.2.3.2

Error log

The package failed to build. The error log from opam follows.

Opam plugin "depext" may require upgrading/reinstalling. Reinstall the plugin on the current switch? [Y/n] y
The following actions will be performed:
  - recompile opam-depext 1.2.3

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved opam-depext.1.2.3  (cached)
-> removed   opam-depext.1.2.3
-> installed opam-depext.1.2.3
Done.

<><> opam-depext.1.2.3 installed successfully <><><><><><><><><><><><><><><><><>
=> opam-depext is unnecessary when used with opam >= 2.1. Please use opam install directly instead
# Run eval $(opam env) to update the current shell environment

<><> Carrying on to "opam depext -viy ocamlspot.4.07.0.2.3.2 jbuilder.transition dune.1.11.4" 

Since version 2.1, opam now handles external dependencies alongside OCaml ones, and the `depext` plugin interface is provided for backwards compatibility only. Consider using your usual `opam install` command to install both OCaml and system dependencies, or `opam install <pkg> --depext-only` if you want to only install external dependencies.
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for ocamlspot.4.07.0.2.3.2 & jbuilder.transition & dune.1.11.4:   * Incompatible packages:
            - (invariant) -> ocaml-base-compiler = 4.07.1
            - ocamlspot >= 4.07.0.2.3.2 -> ocaml = 4.07.0 -> ocaml-system >= 4.07.0
            You can temporarily relax the switch invariant with `--update-invariant'
          * Missing dependency:
            - ocamlspot >= 4.07.0.2.3.2 -> ocaml = 4.07.0 -> ocaml-variants >= 4.07.0 -> ocaml-beta
            unmet availability conditions: 'enable-ocaml-beta-repository'
          * Missing dependency:
            - ocamlspot >= 4.07.0.2.3.2 -> ocaml = 4.07.0 -> ocaml-variants >= 4.07.0 -> system-msvc
            unmet availability conditions: 'os = "win32"'


Command failed: opam --cli=2.1 list --readonly --external '--resolve=ocamlspot.4.07.0.2.3.2,jbuilder.transition,dune.1.11.4' --color=never returned 20