diff --git a/build.sh b/build.sh
index 5877333..5c9bdbb 100755
--- a/build.sh
+++ b/build.sh
@@ -1,11 +1,9 @@
 #!/usr/bin/env bash
 
-BUILD_PATH="_build/"
+build_tmp="_build/"
 
-if [ ! -e $BUILD_PATH ]; then
-    mkdir $BUILD_PATH
-fi
+mkdir ${build_tmp} 2>/dev/null
+cd ${build_tmp}
 
-cd _build/
-cmake ../
-make -j 4
+cmake --clean-first ..
+make -j 4 --makefile Makefile