ros2 launch not working after source my package

edit

Honestly I do not know what is happeing on the background therefore I'm not able to solve it.

First of all I run my foxy (latest dev) on raspberry pi 3, successfully compiled. Everything works.

I open a new terminal and

source ~/ros2_foxy/install/setup.bash

Now I'm able to run following command

ros2 launch

It says that I didn't provide arguments but it works.

Then I go to my workspace and run the build:

cd ~/my_workspace
colcon build

A now when I do :

source ./install/setup.bash

OR

source ./install/local_setup.bash

Then ros2 launch is not known command:

Failed to load entry point 'launch': No module named 'launch.launch_description_sources'
Traceback (most recent call last):
  File "/home/pi/ros2_foxy/install/ros2cli/bin/ros2", line 11, in <module>
    load_entry_point('ros2cli', 'console_scripts', 'ros2')()
  File "/home/pi/ros2_foxy/build/ros2cli/ros2cli/cli.py", line 43, in main
    required=False, argv=argv)
  File "/home/pi/ros2_foxy/build/ros2cli/ros2cli/command/__init__.py", line 236, in add_subparsers_on_demand
    extension = command_extensions[name]
KeyError: 'launch'

And it is not in the list of ros2 commands anymore:

lttng module version >=2.10.7 required, found 2.10.6
Failed to load entry point 'test': No module named 'launch.actions'
Failed to load entry point 'launch': No module named 'launch.launch_description_sources'
usage: ros2 [-h] Call `ros2 <command> -h` for more detailed usage. ...

ros2 is an extensible command-line tool for ROS 2.

optional arguments:
  -h, --help            show this help message and exit

Commands:
  action     Various action related sub-commands
  bag        Various rosbag related sub-commands
  component  Various component related sub-commands
  daemon     Various daemon related sub-commands
  doctor     Check ROS setup and other potential issues
  interface  Show information about ROS interfaces
  lifecycle  Various lifecycle related sub-commands
  multicast  Various multicast related sub-commands
  node       Various node related sub-commands
  param      Various param related sub-commands
  pkg        Various package related sub-commands
  run        Run a package specific executable
  security   Various security related sub-commands
  service    Various service related sub-commands
  topic      Various topic related sub-commands
  trace      Trace ROS nodes to get information on their execution
  wtf        Use `wtf` as alias to `doctor`

  Call `ros2 <command> -h` for more detailed usage.

What went wrong? Is there any docs? What I'm doing wrong? Please help.