Colcon build: ModuleNotFoundError: No module named 'ament_package'

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Any help would be appreciated. Thank you.

(base) birth@birth-Inspiron-7570:~/workspace/ros_ws_foxy_ur_driver$ sudo colcon build
Starting >>> control_msgs
Starting >>> ros2_control_test_assets
Starting >>> controller_manager_msgs
Starting >>> diffbot_description
Starting >>> ros2_control_test_nodes
Starting >>> rrbot_description
Starting >>> ur_client_library
Starting >>> ur_dashboard_msgs
--- stderr: control_msgs                                          
Traceback (most recent call last):
  File "/opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py", line 21, in <module>
    from ament_package.templates import get_environment_hook_template_path
ModuleNotFoundError: No module named 'ament_package'
CMake Error at /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_package_templates-extras.cmake:41 (message):
  execute_process(/home/birth/anaconda3/bin/python3
  /opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py
  /home/birth/workspace/ros_ws_foxy_ur_driver/build/control_msgs/ament_cmake_package_templates/templates.cmake)
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_coreConfig.cmake:41 (include)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmake_export_dependencies-extras.cmake:15 (find_package)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmakeConfig.cmake:41 (include)
  CMakeLists.txt:13 (find_package)


---
Failed   <<< control_msgs [0.42s, exited with code 1]
--- stderr: ros2_control_test_assets
Traceback (most recent call last):
  File "/opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py", line 21, in <module>
    from ament_package.templates import get_environment_hook_template_path
ModuleNotFoundError: No module named 'ament_package'
CMake Error at /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_package_templates-extras.cmake:41 (message):
  execute_process(/home/birth/anaconda3/bin/python3
  /opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py
  /home/birth/workspace/ros_ws_foxy_ur_driver/build/ros2_control_test_assets/ament_cmake_package_templates/templates.cmake)
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_coreConfig.cmake:41 (include)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmake_export_dependencies-extras.cmake:15 (find_package)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmakeConfig.cmake:41 (include)
  CMakeLists.txt:5 (find_package)


---
Failed   <<< ros2_control_test_assets [0.41s, exited with code 1]
--- stderr: controller_manager_msgs              
Traceback (most recent call last):
  File "/opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py", line 21, in <module>
    from ament_package.templates import get_environment_hook_template_path
ModuleNotFoundError: No module named 'ament_package'
CMake Error at /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_package_templates-extras.cmake:41 (message):
  execute_process(/home/birth/anaconda3/bin/python3
  /opt/ros/foxy/share/ament_cmake_core/cmake/package_templates/templates_2_cmake.py
  /home/birth/workspace/ros_ws_foxy_ur_driver/build/controller_manager_msgs/ament_cmake_package_templates/templates.cmake)
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/foxy/share/ament_cmake_core/cmake/ament_cmake_coreConfig.cmake:41 (include)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmake_export_dependencies-extras.cmake:15 (find_package)
  /opt/ros/foxy/share/ament_cmake/cmake/ament_cmakeConfig.cmake:41 (include)
  CMakeLists.txt:8 (find_package)