diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e3dddbe
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "build"]
+	path = build
+	url = https://git.0xmax42.io/maxp/Xilinx-ISE-Build.git
diff --git a/build b/build
new file mode 160000
index 0000000..54949f4
--- /dev/null
+++ b/build
@@ -0,0 +1 @@
+Subproject commit 54949f43c0a900256c15d5d964c6b1da95d27473