Ah, yes— so that’s how Dune does something like what I want. Except I’m also not an admirer of the -no-alias-deps compiler flag, and I suspect that’s in the category of “difference of opinion” not a lack of a feature. Although, issue #1819 is relevant here.
So, it looks like all the features I would need are available in Dune, but the question remains: why would anybody care which build systems I’m using? It would be a fair bit of work to develop a parallel build system for Orsetto that uses Dune (mainly because of the code generator in the Unicode library), and I’m not understanding what problem it would solve.