execSpec.setExecutable("vagrant");
            File vagrantfile = extension.getVagrantfile();
            execSpec.setEnvironment(System.getenv()); // pass through env
            execSpec.environment("VAGRANT_CWD", vagrantfile.getParentFile().toString());
            execSpec.environment("VAGRANT_VAGRANTFILE", vagrantfile.getName());
            extension.getHostEnv().forEach(execSpec::environment);

      create: true,
      owner: "vagrant"
  config.vm.synced_folder "#{Dir.home}/.gradle/wrapper", "/root/.gradle/wrapper",
      create: true,
      owner: "vagrant"

  # Expose project directory. Note that VAGRANT_CWD may not be the same as Dir.pwd
  PROJECT_DIR = ENV['VAGRANT_PROJECT_DIR'] || Dir.pwd
  config.vm.synced_folder PROJECT_DIR, '/project'

  'ubuntu-1604'.tap do |box|
    config.vm.define box, define_opts do |config|