I'm getting the following error when I try to install the dependencies for piface tracker package as given in ROS pifacetracker

ERROR:the following packages/stacks could not have their rosdep keys resolved to system dependencies: pifacetrackergui: Missing resource mjpegserver ROS path [0]=/opt/ros/groovy/share/ros ROS path [1]=/opt/ros/groovy/stacks ROS path [2]=/home/bala/groovyworkspace ROS path [3]=/opt/ros/groovy/share pifacetracker: Missing resource opennicamera ROS path [0]=/opt/ros/groovy/share/ros ROS path [1]=/opt/ros/groovy/stacks ROS path [2]=/home/bala/groovy_workspace ROS path [3]=/opt/ros/groovy/share