diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e641119fe4a1c0cde1ddc05f2e18cc5423e0e50..65049c6b76b74a8c8c37edb6f925efa9c9b5e030 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -121,7 +121,10 @@ else()
   set(LIB_STAGE_PATH "${STAGE_DIR}/lib")
 endif()
 
-file(MAKE_DIRECTORY $STAGE_DIR $EXECUTABLE_OUTPUT_PATH $HEADER_STAGE_PATH LIB_STAGE_PATH)
+file(MAKE_DIRECTORY ${STAGE_DIR} 
+     ${EXECUTABLE_OUTPUT_PATH} 
+     ${HEADER_STAGE_PATH}
+     ${LIB_STAGE_PATH})
 
 if (WIN32)
    # add_definitions(-DBOOST_TEST_INCLUDED)