[nonbirithm]

Probably cargo.

- It was built in to Rust from the beginning and officially sanctioned so fifteen different people don't have to build their own incomplete, buggy package managers.

- You can add plugins for things like automatically updating or adding dependencies.

- It handles projects and subprojects.

- All you have to do to install dependencies and run a project is "cargo run", reducing friction for getting into new projects.

- For the most part, it just works.

That said it isn't perfect, especially when needing custom build scripts, but it's good.