roslaunch cannot find node executable

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I have an ROS node called bag_player_controller inside a package which is also called bag_player_controller. In another ROS package within the same catkin workspace, I have the following lines:

<node name="bag_player_controller" pkg="bag_player_controller" type="bag_player_controller" output="screen" required="false">   
    <!-- name of the bag player node to control -->     
    <param type="str" name="player_name" value="bag_player"/>

</node>

But when I run the launch file, I get this error:

OSError: [Errno 2] No such file or directory: '/home.net/aa17gil/work/mapper/src/bag_player_controller/bag_player_controller'

For some reason, ROS is searching for the executable inside the src directory. But when I do rosrun bag_player_controller bag_player_controller, it runs fine. Also, when I run catkin_find bag_player_controller bag_player_controller, it gives the correct path to the executable inside devel/RelWithDebInfo/lib/bag_player_controller/bag_player_controller, so I don't think there's a problem with my CMakeLists.txt, or my environment.

Any ideas?