mav_tools Missing resource bullet

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Hello there,

I am currently trying to install mav_tools. I'm using rosdep install mav_tools and I have already installed all needed dependencies except for bullet. I am wondering because it should be a system dependency as of Hydro, I am using Indigo and I get this:

ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
laser_height_estimation: Missing resource bullet
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/home/bord/ros_packages
ROS path [2]=/home/bord/catkin_ws/src
ROS path [3]=/opt/ros/indigo/share
ROS path [4]=/opt/ros/indigo/stacks

Thanks