===== RG: r/cargo-snapshot =====
cargoSnapshot: Add package

Cargo downloads your Rust project's dependencies and builds your
project.

The cargoSnapshot derivation simply uses a binary build, because
it's not easy to build cargo from source yet.

In the future, it's expected that we'll also add a derivation for
building cargo from source.
===== RG: r/cargo =====
cargo: Add package

Cargo downloads your Rust project's dependencies and builds your
project.

Note that the 'cargo' derivation is actually broken because we don't
have support for automatically generating Rust dependencies yet
(and manually specifying and updating them would probably be too time
consuming).