Problem tracking down an cmake error in a ROS/gazebo project

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I am trying to upgrade a number of ROS/gazebo nodes made by some other developers:

https://github.com/ethz-asl/rotors_si...

My goal is to get them running with Ubuntu 18.04, ROS melodic and Gazebo 9.

I have been able to solve most of the compile errors, but I seem to have encountered a problem I do not know how to find. My problem is one remaining error, which I have been unable to determine the cause of. It is a bit hard to solve a problem if you do not know what causes it in the first place:

Errors     << rotors_gazebo_plugins:cmake /home/martin/ros_sim_drone/logs/rotors_gazebo_plugins/build.cmake.000.log                                                                                        
CMake Warning (dev) at /usr/share/cmake-3.10/Modules/FindBoost.cmake:911 (if):
  Policy CMP0054 is not set: Only interpret if() arguments as variables or
  keywords when unquoted.  Run "cmake --help-policy CMP0054" for policy
  details.  Use the cmake_policy command to set the policy and suppress this
  warning.

  Quoted variables like "chrono" will no longer be dereferenced when the
  policy is set to NEW.  Since the policy is not set the OLD behavior will be
  used.
Call Stack (most recent call first):
  /usr/share/cmake-3.10/Modules/FindBoost.cmake:1558 (_Boost_MISSING_DEPENDENCIES)
  /usr/share/OGRE/cmake/modules/FindOGRE.cmake:318 (find_package)
  /usr/lib/x86_64-linux-gnu/cmake/gazebo/gazebo-config.cmake:175 (find_package)
  CMakeLists.txt:19 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at CMakeLists.txt:25 (add_library):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "rotors_gazebo_bag_plugin" links to target "UUID::UUID" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at CMakeLists.txt:25 (add_library):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "rotors_gazebo_bag_plugin" links to target "UUID::UUID" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error at /home/martin/ros_sim_drone/src/rotors_simulator/rotors_gazebo_plugins/CMakeLists.txt:26 (target_link_libraries):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:UUID::UUID,INTERFACE_INCLUDE_DIRECTORIES>

  Target "UUID::UUID" not found.


CMake Error:
  Error evaluating generator expression:

    $<TARGET_PROPERTY:UUID::UUID,INTERFACE_INCLUDE_DIRECTORIES>

  Target "UUID::UUID" not found.


CMake Error at /home/martin/ros_sim_drone/src/rotors_simulator/rotors_gazebo_plugins/CMakeLists.txt:26 (target_link_libraries):
  Error evaluating generator expression:

    $<TARGET_PROPERTY:UUID::UUID,INTERFACE_INCLUDE_DIRECTORIES>

  Target "UUID::UUID" not found.

Running catkin_make or catkin build a second time the problem still presists;

Errors     << rotors_gazebo_plugins:make /home/martin/ros_sim_drone/logs/rotors_gazebo_plugins/build.make.000.log                                                                                          
/usr/bin/x86_64-linux-gnu-ld: cannot find -lUUID::UUID
collect2: error: ld ...