If you only ever need to build Rust code then cargo is all you should need. However if you need to build Rust, C, C++, python, and JavaScript all together in on

If you only ever need to build Rust code then cargo is all you should need. However if you need to build Rust, C, C++, python, and JavaScript all together in one build then Cargo is inevitably going to make you sad. That is when you reach for something like Bazel.