@napi-rs/cross-toolchain simplifies building native Node.js addons with cross-compilation using napi-rs. It automates setting up and managing necessary toolchains like GCC and Clang for various target architectures and operating systems. The package streamlines the cross-compilation workflow by providing easy-to-use scripts and configurations, allowing developers to build binaries for multiple platforms from a single development environment. This eliminates manual setup of compilers and linkers, significantly reducing the complexity and time required for cross-platform Node.js addon development with N-API.