While using PWA Studio's scaffolding command if you run into any errors or if you notice the command using old packages, run this file to clear your cache and try again.

pwaCacheClean.js

const fs = require("fs");
const os = require("os");
const { promisify } = require("util");

const exec = promisify(require("child_process").exec);

const temptdir = os.tmpdir();

if (fs.existsSync(`${temptdir}/@magento`)) {
  fs.rmdirSync(`${temptdir}/@magento`, { recursive: true });

  console.log("Done cleaning node cache");
} else {
  console.log("No cached node packages to clear");
}

exec("yarn cache clean")
  .then(() => {
    console.log("Done cleaning yarn cache");
  })
  .catch((err) => {
    console.log("No cached yarn packages to clear");
    console.log(err);
  });

To run

node pwaCacheClean.js