diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
--- a/demo/CMakeLists.txt
+++ b/demo/CMakeLists.txt
@@ -1,13 +1,19 @@
-INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR})
+INCLUDE_DIRECTORIES(
+  ${PROJECT_SOURCE_DIR}
+  ${PROJECT_BINARY_DIR}
+)
 
-LINK_DIRECTORIES(${CMAKE_BINARY_DIR}/lemon)
+LINK_DIRECTORIES(
+  ${PROJECT_BINARY_DIR}/lemon
+)
 
 SET(DEMOS
   arg_parser_demo
   graph_to_eps_demo
-  lgf_demo)
+  lgf_demo
+)
 
 FOREACH(DEMO_NAME ${DEMOS})
   ADD_EXECUTABLE(${DEMO_NAME} ${DEMO_NAME}.cc)
   TARGET_LINK_LIBRARIES(${DEMO_NAME} lemon)
-ENDFOREACH(DEMO_NAME)
+ENDFOREACH()