can't source into workspace

edit

While I am reading different tutorials to create multiple workspaces, I notice that there are 2 ways to do it, either by catkin build or catkin_make.

By using catkin build, the procedures to create a workspace is:

  $source /opt/ros/indigo/setup.bash
  $ mkdir -p ~/catkin_ws/src
  $ cd ~/catkin_ws/src
  $ catkin_init_workspace
  $ cd ~/catkin_ws/
  $ catkin build
  $ source devel/setup.bash

  $ echo $ROS_PACKAGE_PATH
  > /opt/ros/indigo/share:/opt/ros/indigo/stacks

By using catkin_make, the procedure looks similar:

   $ source /opt/ros/indigo/setup.bash
   $ mkdir -p ~/catkin_ws2/src
   $ cd ~/catkin_ws2/
   $ catkin_make
   $ source devel/setup.bash

   $ echo $ROS_PACKAGE_PATH
   > /home/username/catkin_ws2/src:/opt/ros/indigo/share:/opt/ros/indigo/stacks

I used above 2 methods to create 2 workspace: catkin_ws and catkin_ws2 independently. Then I check if the environment has been sourced correctly. The 1st workspace has not been sourced correctly while 2nd workspace has been sourced correctly. I would like to know where am I wrong and how to fix it.