Dune build -w also run bin on change

Learning
1

I have a dune project with

/src
  /lib-a
  /lib-b
  /lib-c
  /bin-gen

lib-{a, b, c} are dune ‘libraries’.
bin-gen contains code that auto generates compatible OCaml ↔ Rust bindings;

I want it so that anytime anything in src/bin-gen/ changes, the existing dune build -w will rebuild src/bin-gen and then execute the Main function.

Is there a way to do this via dune ?

Thanks!

2

Try dune exec -w project_name