diff --git a/lemon/CMakeLists.txt b/lemon/CMakeLists.txt
--- a/lemon/CMakeLists.txt
+++ b/lemon/CMakeLists.txt
@@ -1,6 +1,6 @@
 INCLUDE_DIRECTORIES(
-  ${CMAKE_SOURCE_DIR}
-  ${CMAKE_BINARY_DIR}
+  ${PROJECT_SOURCE_DIR}
+  ${PROJECT_BINARY_DIR}
 )
 
 CONFIGURE_FILE(