diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50df8e48..43fa60ed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,12 @@
 cmake_minimum_required(VERSION 2.8)
 
 PROJECT(picrin)
+
+# load extra cmake modules
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
 
+# ----
+
 # git submodule update --init
 execute_process(
   COMMAND ${GIT_EXECUTABLE} submodule update --init
@@ -26,6 +30,8 @@ include(tools/CMakeLists.txt)
 file(COPY piclib DESTINATION .)
 file(COPY etc DESTINATION .)
 
+# ----
+
 # $ make run
 add_custom_target(run bin/picrin DEPENDS repl)