diff --git a/index.js b/index.js
index a216c347..a58cab9b 100644
--- a/index.js
+++ b/index.js
@@ -334,6 +334,10 @@
 //. const $ = window.sanctuaryDef;
 //. // ...
 //. ```
+//. If you are using rollup in your project, where you have integrated Sanctuary, you might
+//. get errors. Please import builtins and globals from rollup-plugin-node-builtins and 
+//. rollup-plugin-node-globals respectively, in the rollup config file. These are needed to add 
+//. the utils folder, which is referenced in the sanctuary code.
 //.
 //. ## API