ysc) can upgrade your older .yarn scripts to the latest syntax. ysc) is in heavy development, and is likely to have its own complete section here, in the documentation, before long. Until then, find further initial documentation via its GitHub project.ysc on your command-line/terminal with the upgrade parameter and a path to a yarn file:.yarn files as you want:ysc will replace the existing .yarn files you've passed in, as part of the upgrade. If you don't want it to do this, either make sure you have a backup, or pass in the --output-directory option, after the upgrade parameter. For example: