Gazebo rplidar not found

Hi,
I’m running in container px4io/px4-dev-ros:2018-09-06-ubuntu1604 and running make posix gazebo works well, but running make posix gazebo_iris_rplidar gives the following errors:

[Err] [Plugin.hh:165] Failed to load plugin libgazebo_opticalFlow_plugin.so: libgazebo_opticalFlow_plugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:165] Failed to load plugin libGpuRayPlugin.so: libGpuRayPlugin.so: cannot open shared object file: No such file or directory
[Err] [Plugin.hh:165] Failed to load plugin libgazebo_ros_gpu_laser.so: libGpuRayPlugin.so: cannot open shared object file: No such file or directory

It appears I have libGpuRayPlugin.so in /usr/lib/x86_64-linux-gnu/gazebo-7/plugins/libGpuRayPlugin.so but its not recognizing it for some reason. I can’t find libgazebo_opticalFlow_plugin.so anywhere in the container.

Any ideas what am I doing wrong?