docs: function () {
              var dest = path.join(options.dest, themes[count]);
  
              // deletes theme is already exists.
              if (fs.exists(dest)) {
                  fs.rmdir(dest);
              }
  
              mv(path.join(options.themes, themes[count], 'dist'), dest, {mkdirp: true}, function() {
                  buildNextTheme();
              });
          }