After following the tutorial here http://ros.org/wiki/ROS/Tutorials/WritingPublisherSubscriber(python)

using the catkin build system, I would like to install the resulting node.

If I run the talker.py node like this

    ~/Desktop/workspace$ . devel/setup.bash

    ~/Desktop/workspace$ rosrun beginner_tutorial talker.py

everything works fine.

However, if I try to install and run, the node cannot be found

    ~/Desktop/workspace$ make -C build install

    <snip build output>

    ~/Desktop/workspace$ . install/setup.bash

    ~/Desktop/workspace$ rosrun beginner_tutorial talker.py

    [rosrun] Couldn't find executable named talker.py below /home/user/Desktop/workspace/install/share/beginner_tutorial

What do I need to add so that the node is installed in such a way that rosrun can find it?