Hector quadrotor built package failure

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Hi, i have donwloaded the all required packages from the repository and put them into a directory hector_quadrotor/src. When i want build build the catkin workspace as usual:

cd hector_quadrotor/src catkin_init_workspace cd .. catkin_make

i find this error: make[2]: * No rule to make target /usr/lib/libflann_cpp_s.a', needed by/home/stefano/Desktop/hector_quad/devel/lib/libhector_quadrotor_controller_gazebo.so'. Stop.

what can i do? Thanks to all