Cargo will not ever look on crates.io for a library if you specify a `registry` attribute for a dependency. https://doc.rust-lang.org/cargo/reference/registries

Cargo will not ever look on crates.io for a library if you specify a `registry` attribute for a dependency. https://doc.rust-lang.org/cargo/reference/registries.html https://doc.rust-lang.org/cargo/reference/registries.html