Next.js now uses Rust-based compiler [SWC](https://swc.rs/) to compile JavaScript/TypeScript. This new compiler is up to 17x faster than Babel when compiling individual files and up to 5x faster Fast Refresh.
SWC requires a binary to be downloaded that is compatible with your system. In some cases this binary may fail to load either from failing to download or an incompatibility with your architecture.
When on an M1 Mac and switching from a Node.js version without M1 support to one with, e.g. v14 to v16, you may need a different swc dependency which can require re-installing `node_modules` (`npm i --force` or `yarn install --force`).
Alternatively, you might need to allow optional packages to be installed by your package manager (remove `--no-optional` flag) for the package to download correctly.
In some cases your package manager (e.g. `npm`) might have generated a lockfile that only includes `optionalDependencies` specific to the platform it was generated on, preventing the `optionalDependency` needed for CI from being installed.
This can be fixed by removing the lockfile and regenerating it with a newer version of your package manager `npm i -g npm@latest`.
If SWC continues to fail to load you can opt-out by disabling `swcMinify` in your `next.config.js` or by adding a `.babelrc` to your project with the following content:
