This crate is used to create a nix derivation file. The derivation uses [`buildRustCrate`][buildRustCrate] to build
and cache each dependency individually. This allows the cache to be shared between projects if the dependency is
the same version with the same features activated.
[buildRustCrate]: https://github.com/NixOS/nixpkgs/blob/master/doc/languages-frameworks/rust.section.md#buildrustcrate-compiling-rust-crates-using-nix-instead-of-cargo-compiling-rust-crates-using-nix-instead-of-cargo