don't build extension when using via bundler and git
don't build extension when using via bundler and git

songling88/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,songling88/zookeeper,songling88/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,songling88/zookeeper