old_contents: #!/usr/bin/env node
  
  console.error("The CLI has been moved into the package `babel-cli`. See http://babeljs.io/docs/usage/cli/");
  process.exit(1);
  
new_contents: #!/usr/bin/env node
  
  console.error("You have mistakenly installed the `babel` package, which is a no-op in Babel 6.\n" +
    "Babel's CLI commands have been moved from the `babel` package to the `babel-cli` package.\n" +
    "\n" +
    "    npm uninstall babel\n" +
    "    npm install babel-cli\n" +
    "\n" +
    "See http://babeljs.io/docs/usage/cli/ for setup instructions.");
  process.exit(1);
  
subject: Improve the error messaging for using the wrong CLI script.