/**
  * @param string $package
  *
  * @return string
  */
 public function getLinkLocation($package)
 {
     do {
         if (isset($linkTo)) {
             printf("> Directory '%s' does not exist.\n", $linkTo);
         }
         $linkTo = UserPrompt::prompt(sprintf("> Enter full path to base directory for '%s': ", $package));
     } while (!file_exists($linkTo));
     return $linkTo;
 }