variable soy is undeclared

[lemito]

simple.soy.js:22:54: ERROR - [JSC_UNDEFINED_VARIABLE] variable soy is undeclared
  22|   return '' + ((! opt_data.greetingWord) ? 'Hello ' + soy.$$escapeHtml(opt_data.name) + '!' : soy.$$escapeHtml(opt_data.greetingWord) + ' ' + soy.$$escapeHtml(opt_data.name) + '!');

[lukiod]

import * as soy from 'soyutils';
use this as a lib