Following the discussions about deprecating Pervasives in OCaml, I think it might be beneficial to define/implement a general way to autodetect and autofix deprecations through dune plugin. A good way for this is Rust's cargo fix:

• https://github.com/rust-lang-nursery/rustfix
• https://doc.rust-lang.org/nightly/edition-guide/editions/transitioning-an-existing-project-to-a-new-edition.html

See discussions here:

• Deprecate Pervasives ocaml#1605
• https://discuss.ocaml.org/t/backwards-compatibility/4258/6
• https://discuss.ocaml.org/t/the-end-of-camlp4/4216