I stumbled on that trying to build stdlib_shims: ``` File "_build/.dune/default/src/dune", line 2, characters 0-75: 2 | (library 3 | (wrapped false) 4 | (name stdlib_shims) 5 | (public_name stdlib-shims)) Error: Rule failed to generate the following targets: - src/stdlib_shims.lib ``` For more detail see https://github.com/ocaml/stdlib-shims/issues/11 @diml suggested it should be fixed on dune's side.