ROS Kinetic (PI) : Could not find a package configuration file provided by "Eigen3"

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So I am running ROS Kinetic on my Pi which has been working well. I needed to ask some packages (Hector Slam etc) and so I needed to add Nav_Msgs and rebuild the workspace

When I run sudo ./src/catkin/bin/catkin_make_isolated --install -DCMAKE_BUILD_TYPE=Release --install-space /opt/ros/kinetic -j2

I get the error below (I have installed sudo apt-get install libeigen3-dev)

CMake Error at CMakeLists.txt:8 (find_package): By not providing "FindEigen3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Eigen3", but CMake did not find one.

Could not find a package configuration file provided by "Eigen3" with any of the following names:

Eigen3Config.cmake
eigen3-config.cmake

Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
"Eigen3_DIR" to a directory containing one of the above files. If "Eigen3"
provides a separate development package or SDK, be sure it has been
installed.

-- Configuring incomplete, errors occurred! See also "/home/pi/ros_catkin_ws/build_isolated/eigen_stl_containers/CMakeFiles/CMakeOutput.log". See also "/home/pi/ros_catkin_ws/build_isolated/eigen_stl_containers/CMakeFiles/CMakeError.log". <== Failed to process package 'eigen_stl_containers': Command '['/opt/ros/kinetic/env.sh', 'cmake', '/home/pi/ros_catkin_ws/src/eigen_stl_containers', '-DCATKIN_DEVEL_PREFIX=/home/pi/ros_catkin_ws/devel_isolated/eigen_stl_containers', '-DCMAKE_INSTALL_PREFIX=/opt/ros/kinetic', '-DCMAKE_BUILD_TYPE=Release', '-G', 'Unix Makefiles']' returned non-zero exit status 1

Reproduce this error by running: ==> cd /home/pi/ros_catkin_ws/build_isolated/eigen_stl_containers && /opt/ros/kinetic/env.sh cmake /home/pi/ros_catkin_ws/src/eigen_stl_containers -DCATKIN_DEVEL_PREFIX=/home/pi/ros_catkin_ws/devel_isolated/eigen_stl_containers -DCMAKE_INSTALL_PREFIX=/opt/ros/kinetic -DCMAKE_BUILD_TYPE=Release -G 'Unix Makefiles'