diff --git a/tools/build/build.py b/tools/build/build.py
index bc94b023..cb66d952 100755
--- a/tools/build/build.py
+++ b/tools/build/build.py
@@ -35,8 +35,8 @@ def build_oxjs(downloads=False, geo=False):
 
     root_path = '../../'
     source_path = root_path + 'source/'
-    dev_path = root_path + 'dev/'
-    min_path = root_path + 'min/'
+    dev_path = root_path + 'dev.tmp/'
+    min_path = root_path + 'min.tmp/'
 
     locales = {}
     version = get_version()
@@ -298,7 +298,15 @@ def build_oxjs(downloads=False, geo=False):
     build_path = root_path + 'build/'
     if os.path.exists(build_path) and not os.path.islink(build_path[:-1]):
         shutil.rmtree(build_path)
-    write_link('min', build_path[:-1])
+        write_link('min', build_path[:-1])
+    real_dev_path = root_path + 'dev/'
+    real_min_path = root_path + 'min/'
+    if os.path.exists(real_dev_path):
+        shutil.rmtree(real_dev_path)
+    shutil.move(dev_path,real_dev_path)
+    if os.path.exists(real_min_path):
+        shutil.rmtree(real_min_path)
+    shutil.move(min_path,real_min_path)
 
 
 def copy_file(source, target):