diff --git a/build-deps.sh b/build-deps.sh
index 23bb9e9..74b1cfa 100644
--- a/build-deps.sh
+++ b/build-deps.sh
@@ -16,14 +16,18 @@ cd $(dirname "$0")
 if [ "$(uname)" = "Darwin" ]; then
   libtoolBin=$(which glibtoolize)
   libtoolBinDir=$(dirname "${libtoolBin}")
-  ln -s $libtoolBin "${libtoolBinDir}/libtoolize"
+
+  if [ ! -f "${libtoolBinDir}/libtoolize" ]; then
+    ln -s $libtoolBin "${libtoolBinDir}/libtoolize"
+  fi
 fi
 
 # general deps: gcc make autoconf automake libtool cmake
 
 # test - cmocka
 cd ./test/lib/cmocka
-mkdir build
+rm -rf build
+mkdir -p build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
 make -j8