Make sure you have the latest gulpfile: https://github.com/roots/roots/commit/c6a0f6eab9fd995caa4cfcc6e88d109fa1c99a86#diff-b9e12334e9eafd8341a6107dd98510c9R173
JsHint will only run on your project javascript now. Previously it did run on all JS including third-party bower files (bad).