Cannot include header from another package

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I have a package my_lib, that contains Parameters.h in he include folder, which I need to include in another package my_main . I am following this answer to do so: https://answers.ros.org/question/2019... But I get

fatal error: my_lib/Parameters.h: No such file or directory compilation terminated.

when I run catkin_make. I can see Parameters.h appear successfully in catkin_ws/install/include/my_lib after I ran catkin_make install. In my_main package i did the following:

package.xml: added

<build_depend>my_lib</build_depend>
<exec_depend>my_lib</exec_depend>

CMakeLists.txt:

find_package(catkin REQUIRED COMPONENTS
  ...(other packages used in my_main)  
  my_lib )
find_package(Boost REQUIRED COMPONENTS system) 
catkin_package(INCLUDE_DIRS include
  LIBRARIES my_main 
  CATKIN_DEPENDS ...(other packages used in my_main) my_lib
  DEPENDS system_lib)
include_directories(   include  
  ${catkin_INCLUDE_DIRS}  
  ${Boost_INCLUDE_DIRS} )
  add_executable(my_main_node src/my_main_node.cpp)
target_link_libraries(my_main_node   ${catkin_LIBRARIES} )
install(DIRECTORY
  include/${PROJECT_NAME}/   DESTINATION
  ${CATKIN_PACKAGE_INCLUDE_DESTINATION} 
  FILES_MATCHING PATTERN "*.h"   PATTERN
  ".svn" EXCLUDE )

What am I missing?