Do not install userguide, this code does not honor $(DESTDIR)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -693,10 +693,10 @@
 # Install fonts
 INSTALL(FILES ${Canorus_Fonts} DESTINATION "${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/fonts")
 # Install users manual, if it exists
-INSTALL(CODE "FILE(MAKE_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc)")
-INSTALL(CODE "FILE(MAKE_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc/usersguide)")
-FILE(GLOB Canorus_Usersguide RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ../doc/usersguide/*.qhc ../doc/usersguide/*.qch)
-INSTALL(FILES ${Canorus_Usersguide} DESTINATION "${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc/usersguide")
+#INSTALL(CODE "FILE(MAKE_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc)")
+#INSTALL(CODE "FILE(MAKE_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc/usersguide)")
+#FILE(GLOB Canorus_Usersguide RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ../doc/usersguide/*.qhc ../doc/usersguide/*.qch)
+#INSTALL(FILES ${Canorus_Usersguide} DESTINATION "${CMAKE_INSTALL_PREFIX}/${CANORUS_INSTALL_DATA_DIR}/doc/usersguide")
 
 IF(MINGW)
 	# Install Qt libs
