Patching packages in Yarn berry

At one point, patching a package in Yarn was as simple as yarn patch <package-name> and following the prompts. Now, it’s riddled with unintuitive bugs. Let’s walk through it.

Patching the package

To prepare the package for patching, run yarn patch <package-name>. The command output should specify a temporary directory for you to edit. Make the desired changes to the package in that directory, then follow the subsequent command in the output: yarn patch-commit -s <directory>.

Verifying the results