古月老师好，我根据您的书籍《ROS机器人开发实践》中说的，下载了仓库git clone https://github.com/huchunxu/ros_exploring.git，但是在编译的时候提示以下错误，我的环境是Ubuntu16.04，安装的ROS kinetic，而且编译其他包也都成功了，这是怎么回事呢？

CMake Error at /opt/ros/kinetic/share/catkin/cmake/catkin_workspace.cmake:95 (message):
This workspace contains non-catkin packages in it, and catkin cannot build
a non-homogeneous workspace without isolation. Try the
‘catkin_make_isolated’ command instead.
Call Stack (most recent call first):
CMakeLists.txt:67 (catkin_workspace)

— Configuring incomplete, errors occurred!
See also “/home/wjw/catkin_ws/build/CMakeFiles/CMakeOutput.log”.
See also “/home/wjw/catkin_ws/build/CMakeFiles/CMakeError.log”.