How to make use of actionfiles between two packages?

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I had this same problem and wanted to add that you also need a secondary depency. For example I have a target (your_program) which depends on action files generated from a secondary package (action_package). In the following scenario catkin_make requires:

add_executable(your_program src/your_program.cpp)
add_dependencies(your_program ${catkin_EXPORTED_TARGETS} action_package_generate_messages_cpp )

Otherwise the catkin_make will fail because it cannot find the headers for a particular action file. I am not sure if this problem is repeatable but I banged my head against the wall for a while so hopefully this will help someone.