diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index a695689afef..ac93037836c 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -316,13 +316,17 @@ ENDFOREACH(pyfile)
 FOREACH(module ${PY_MODULES})
   ADD_CUSTOM_TARGET(py${module} ALL)
   ADD_DEPENDENCIES(py${module} python_module_qgis__${module})
-  FILE(GLOB_RECURSE PY_FILES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${module}/*.py)
-  INSTALL(FILES ${PY_FILES} DESTINATION "${QGIS_PYTHON_DIR}")
+  FILE(GLOB PY_FILES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${module}/*.py)
+  FILE(GLOB PY_FILES_ADDITIONS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${module}/additions/*.py)
+  INSTALL(FILES ${PY_FILES} DESTINATION "${QGIS_PYTHON_DIR}/${module}")
+  INSTALL(FILES ${PY_FILES_ADDITIONS} DESTINATION "${QGIS_PYTHON_DIR}/${module}/additions")
+  SET(PY_FILES ${PY_FILES} ${PY_FILES_ADDITIONS})
   FOREACH(pyfile ${PY_FILES})
+    GET_FILENAME_COMPONENT(subdir ${pyfile} DIRECTORY)
     ADD_CUSTOM_COMMAND(TARGET py${module}
       POST_BUILD
-      COMMAND ${CMAKE_COMMAND} -E make_directory "${QGIS_PYTHON_OUTPUT_DIRECTORY}"
-      COMMAND ${CMAKE_COMMAND} -E copy ${pyfile} "${QGIS_PYTHON_OUTPUT_DIRECTORY}/${pyfile}"
+      COMMAND ${CMAKE_COMMAND} -E make_directory "${QGIS_PYTHON_OUTPUT_DIRECTORY}/${subdir}"
+      COMMAND ${CMAKE_COMMAND} -E copy ${pyfile} "${QGIS_PYTHON_OUTPUT_DIRECTORY}/${subdir}"
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
       DEPENDS ${PY_FILES}
     )