diff --git a/README.md b/README.md
index f99e252..c79511b 100644
--- a/README.md
+++ b/README.md
@@ -81,4 +81,15 @@ Then start the proxy passing port number as an argument:
 $ PORT=1234 coffee proxy.coffee
 ```
 
-Visit the port in question in the browser and continue as before.
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+Visit the port in question in the browser and continue as before.
+
+##Build It
+
+If you would like to run your own build for a custom version of the app, use the [Apps/B Builder](https://github.com/intermine/apps-b-builder).
+
+In short:
+
+```bash
+$ npm install apps-b-builder -g
+$ apps-b build ./src/ ./build/
+```
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