diff --git a/BUILD.md b/BUILD.md
index d0b8ac164..dfedac331 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -20,6 +20,9 @@ brew tap scripthaus-dev/scripthaus
 brew install scripthaus
 ```
 
+You also need a relatively modern nodejs with npm and yarn installed.
+Node can be installed from [here](https://nodejs.org).  npm can install yarn using `npm install -g yarn`.
+
 ## Clone the Repo
 
 ```