message: Output script path in error
diff: @@ -21,9 +21,9 @@ const { getPackages } = require('@manypkg/get-packages');
  const path = require('path');
  async function main() {
  - const [version, outputPath] = process.argv.slice(2);
  + const [script, version, outputPath] = process.argv.slice(1);
  if (!version || !outputPath) {
  - throw new Error('Argument must be script.js <version> <outputPath>');
  + throw new Error(`Argument must be ${script} <version> <outputPath>`);
  }
  const manifestDir = path.resolve(outputPath, version);
  