set var gutil = require('gulp-util')

Gulpfile.js

@@ -6,6 +6,7 @@ var concat = require('gulp-concat');
 var cssnano = require('gulp-cssnano');
 var del = require('del');
 var gulp = require('gulp');
+var gutil = require('gulp-util');
 var imagemin = require('gulp-imagemin');
 var mqpacker = require('css-mqpacker');
 var neat = require('bourbon-neat').includePaths;