code: function() {
          var distDir = this.readConfig('distDir');
          var packedDirName = this.readConfig('packedDirName');
          var archivePath = this.readConfig('archivePath');
  
          if (packedDirName) {
            packedDirName = path.join(archivePath, packedDirName);
            this.log('moving ' + distDir + ' to ' + packedDirName);
  
            this.distDir = packedDirName;
            return move(distDir, packedDirName);
          }
  
          return RSVP.resolve();
        }
docs: to allow configurable naming of the directory inside the tarball