diff --git a/make.sh b/make.sh
index e50b890..2aca565 100755
--- a/make.sh
+++ b/make.sh
@@ -155,7 +155,11 @@ build_dir_tree() {
         return 1
     fi
 
-    local DIR="${INSTALL_PREFIX}$1"
+    build_dir_tree_recurse "${INSTALL_PREFIX}$1"
+}
+
+build_dir_tree_recurse() {
+    local DIR="$1"
 
     # if the directory already exists, return success
     [ -d "${DIR}" ] && return 0
@@ -173,7 +177,7 @@ build_dir_tree() {
     mkdir "${DIR}" >& /dev/null
     if [ $? -ne 0 ]
     then
-        build_dir_tree $(dirname "${DIR}") || return 1
+        build_dir_tree_recurse $(dirname "${DIR}") || return 1
         mkdir "${DIR}"
         if [ $? -ne 0 ]
         then