If you run make lock with an opam switch using OCaml 5, you got two new packages in the lock files: base-domains and base-nnp. Not surprisingly, the former requires OCaml 5. The latter is an optional dependency for OCaml 4 so I prevent from adding it too in the lock file.
If you run
make lockwith anopamswitch usingOCaml 5, you got two new packages in the lock files:base-domainsandbase-nnp. Not surprisingly, the former requiresOCaml 5. The latter is an optional dependency forOCaml 4so I prevent from adding it too in the lock file.