diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d42d04a..241d7f6f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -750,28 +750,41 @@ if (NOT APPLE AND UNIX)
 	)
   endif()
 
-  install(DIRECTORY
+
+  if (EXISTS books)
+
+     install(DIRECTORY
 	${CMAKE_SOURCE_DIR}/books
 	${CMAKE_SOURCE_DIR}/data
 	${CMAKE_SOURCE_DIR}/fonts
 	${CMAKE_SOURCE_DIR}/images
 	${CMAKE_SOURCE_DIR}/items
-	${CMAKE_SOURCE_DIR}/lang
 	${CMAKE_SOURCE_DIR}/maps
 	${CMAKE_SOURCE_DIR}/models
 	${CMAKE_SOURCE_DIR}/music
 	${CMAKE_SOURCE_DIR}/sound
 	DESTINATION "${CMAKE_INSTALL_PREFIX}"
-  )
+     )
 
-  install(FILES
+     install(FILES
   	${CMAKE_SOURCE_DIR}/steam_appid.txt
+	DESTINATION "${CMAKE_INSTALL_PREFIX}"
+     )
+     endif()
+     
+     install(DIRECTORY
+	${CMAKE_SOURCE_DIR}/lang
+	DESTINATION "${CMAKE_INSTALL_PREFIX}"
+     )
+     
+     install(FILES
   	${CMAKE_SOURCE_DIR}/gamecontrollerdb.txt
   	${CMAKE_SOURCE_DIR}/playernames-female.txt
   	${CMAKE_SOURCE_DIR}/playernames-male.txt
 	#TYPE INCLUDE # If your CMAKE is stupid like mine and it complains about "install FILES given no DESTINATION!", you can tell it to shove it by uncommenting this line.
   	DESTINATION "${CMAKE_INSTALL_PREFIX}"
-  )
+     )
+     
 endif()
 # 2) Windows install targets
 if (WIN32)