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Very handy, thanks. I notice that the openxt-ocaml-platform repo uses ocamlbuild/ocamlfind. Life should get a lot easier when we move that to use ocaml/dune directly -- cross-compilation really needs a lot of help from the build system, and dune is moving fast to support these workflows.

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Hopefully there can be a way to use ocaml/dune directly without importing "everything" into each per-component build tree. OE best practices employ per-recipe sysroots for building each component, where a minimal set of dependencies is present for the build environment. This helps with reproducible builds and generation of manifests for supply chain integrity.

Yes that should be fine. For incremental installation, there is a `dune build -x` which builds using a particular cross-compilation toolchain. MirageOS builds everything in one go, but it can be broken up too (as opam itself does).

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