diff --git a/build.sh b/build.sh
index 58a7bda..557e430 100644
--- a/build.sh
+++ b/build.sh
@@ -48,6 +48,11 @@ do
     cp -r ../bird/* bird/
     cp -r ../bind/* bind/
 
+    # Copy system-local custom files (if they even exist)
+    cp -r $dir/tinc/ bind/
+    cp -r $dir/bird/ bind/
+    cp -r $dir/bind/ bind/
+
     # Tinc
     #  Remove existing configuration
     rm -v -rf /etc/tinc/$netname/*