diff --git a/plugins/demo/README.md b/plugins/demo/README.md
index bc6162b..f6141ab 100644
--- a/plugins/demo/README.md
+++ b/plugins/demo/README.md
@@ -1,6 +1,7 @@
 # Demo
 
 A demo project of a custom scittle build.
+This demo project uses the `scittle.datascript` plugin which isn't part of the normal scittle distribution.
 
 To produce release `.js` files, run: `bb release`.