diff --git a/CMakeLists.txt b/CMakeLists.txt
index 110ebf11..796c292a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 2.8.8)
 
 PROJECT(picrin)
 
@@ -15,12 +15,11 @@ execute_process(
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY bin)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY lib)
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY lib)
 set(CMAKE_C_FLAGS "-Wall -Wextra -std=c99")
 set(CMAKE_C_FLAGS_DEBUG "-g -DDEBUG=1")
 
 # external libraries
-add_library(xfile STATIC extlib/xfile/xfile.c)
+add_library(xfile OBJECT extlib/xfile/xfile.c)
 
 # build picrin
 include_directories(include extlib)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b1276754..cbecb0a8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,5 +5,5 @@ set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES ${PROJECT_SOURCE
 
 # build!
 file(GLOB C_SOURCES ${PROJECT_SOURCE_DIR}/src/*.c)
-add_library(picrin SHARED ${C_SOURCES} ${FLEX_scan_OUTPUTS})
-target_link_libraries(picrin m xfile)
+add_library(picrin SHARED ${C_SOURCES} ${FLEX_scan_OUTPUTS} $<TARGET_OBJECTS:xfile>)
+target_link_libraries(picrin m)