Why can't catkin_make find my existing packages?

edit

When running $ catkin_make I receive the following error:

 CMake Error at /usr/share/catkin/cmake/catkinConfig.cmake:75 (find_package):
  Could not find a package configuration file provided by "librealsense" with
  any of the following names:

    librealsenseConfig.cmake
    librealsense-config.cmake

  Add the installation prefix of "librealsense" to CMAKE_PREFIX_PATH or set
  "librealsense_DIR" to a directory containing one of the above files.  If
  "librealsense" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  realsense/realsense_camera/CMakeLists.txt:17 (find_package)

Normally this means the dependency is missing but check this out:

$ rosdep install --from-path src
#All required rosdeps installed successfully

and

$ sudo apt-get install ros-kinetic-librealsense 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
ros-kinetic-librealsense is already the newest version (1.11.0-0xenial-20161003-141254-0700).
0 upgraded, 0 newly installed, 0 to remove and 321 not upgraded.

And if I look inside /opt/ros/kinetic/share I can see the librealsense package there. The librealsenseConfig.cmake exists inside of the ./cmake folder there.

Why isn't find_package able to find this package?