diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5643bf6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "xctool"]
+	path = xctool
+	url = https://github.com/facebook/xctool.git
+	ignore = dirty
diff --git a/xctool b/xctool
new file mode 160000
index 0000000..9680172
--- /dev/null
+++ b/xctool
@@ -0,0 +1 @@
+Subproject commit 9680172729a9c63f7efb4d2759a95b43f632b28f