Cargo Features

ocaml-build has no features set by default.

ocaml-build = { version = "1.0.0-beta.4", features = ["dune"] }
dune = cc

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

cc dune?