Fix xargs warning
@@ -664,7 +664,7 @@ build_dir="_build"
rm -rf $build_dir
mkdir $build_dir
-find -type d ! -wholename "." ! -wholename "./$build_dir" | xargs -n 1 -I {} cp -r {} $build_dir
+find -type d ! -wholename "." ! -wholename "./$build_dir" | xargs -I {} cp -r {} $build_dir
cd _build
