diff --git a/CMakeLists.txt b/CMakeLists.txt
index cbc7883a..a46c0557 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,6 @@ include_directories(extlib/benz/include)
 include(piclib/CMakeLists.txt)
 include(contrib/CMakeLists.txt)
 include(src/CMakeLists.txt)
-include(tools/CMakeLists.txt)
 
 # ----
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f4a62f1d..0ca3b949 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,5 @@
+### libpicrin ###
+
 find_package(Perl REQUIRED)
 
 # benz
@@ -31,3 +33,15 @@ target_link_libraries(picrin m ${PICRIN_CONTRIB_LIBRARIES})
 set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
 install(TARGETS picrin DESTINATION lib)
 install(DIRECTORY extlib/benz/include/ DESTINATION include FILES_MATCHING PATTERN "*.h")
+
+### picrin ###
+
+list(APPEND REPL_LIBRARIES picrin)
+
+# build
+add_executable(repl src/main.c)
+set_target_properties(repl PROPERTIES OUTPUT_NAME picrin)
+target_link_libraries(repl ${REPL_LIBRARIES})
+
+# install
+install(TARGETS repl RUNTIME DESTINATION bin)
diff --git a/tools/main.c b/src/main.c
similarity index 100%
rename from tools/main.c
rename to src/main.c
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
deleted file mode 100644
index 24794f53..00000000
--- a/tools/CMakeLists.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-list(APPEND REPL_LIBRARIES picrin)
-
-# build
-add_executable(repl tools/main.c)
-set_target_properties(repl PROPERTIES OUTPUT_NAME picrin)
-target_link_libraries(repl ${REPL_LIBRARIES})
-
-# install
-install(TARGETS repl RUNTIME DESTINATION bin)