## Working on an Existing Cargo Package

If you download an existing package that uses Cargo, it’s really easy to get going.

First, get the package from somewhere. In this example, we’ll use rand cloned from its repository on GitHub:

$git clone https://github.com/rust-lang-nursery/rand.git$ cd rand


To build, use cargo build:

\$ cargo build
Compiling rand v0.1.0 (file:///path/to/package/rand)


This will fetch all of the dependencies and then build them, along with the package.