code: function(less) {
      this.less = less;
      this.require = function(prefix) {
          prefix = path.dirname(prefix);
          return function(id) {
              var str = id.substr(0, 2);
              if (str === '..' || str === './') {
                  return require(path.join(prefix, id));
              }
              else {
                  return require(id);
              }
          };
      };
  }
docs: Node Plugin Loader