code: function transpileMinifyLESS(src) {
    return gulp.src(src)
      .pipe(sourcemaps.init())
      .pipe(lessCompiler({
        paths: [ path.join(__dirname, 'less', 'includes') ]
      }))
      .pipe(cssmin().on('error', function(err) {
        console.log(err);
      }))
      .pipe(rename({suffix: '.min'}))
      .pipe(sourcemaps.write())
      .pipe(gulp.dest(function (file) {
        return __dirname + file.base.slice(__dirname.length);
      }));
  }
docs: Build and minify LESS separately