old_contents: var gulp = require('gulp');
  
  gulp.task('buildStyles', function (done) {
      gulp
          .src(env.DIR_SRC + '/**/*.css')
          .pipe(gulp.dest(env.DIR_DEST + '/assets/styles/'))
          .on('end', function () {
              done();
          });
  });
  
new_contents: var gulp = require('gulp');
  
  gulp.task('buildStyles', function (done) {
      gulp
          .src(env.DIR_SRC + '/assets/styles/**/*.css')
          .pipe(gulp.dest(env.DIR_DEST + '/assets/styles/'))
          .on('end', function () {
              done();
          });
  });
  
subject: update comments