:warning: WARNING! This package is deprecated in favour of Nightwatch v2 as it supports Cucumber out of the box.
nightwatch-cucumber 
http://mucsi96.github.io/nightwatch-cucumber
This module enables to use a BDD-style approach for cross-browser testing:
- Describe user stories in Cucumber using Gherkin syntax
- Map them to browser operations and assertions in Nightwatch.js
- Run using either real browser, headless browser or cloud based WebDriver services such as SauceLabs or BrowserStack