diff --git a/.gitignore b/.gitignore
index 378eac2..00f42a6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 build
+/olm-*.tgz
diff --git a/README.rst b/README.rst
index ffe72f9..d5597da 100644
--- a/README.rst
+++ b/README.rst
@@ -27,7 +27,8 @@ To build the javascript bindings, install emscripten from http://kripken.github.
 
 .. code:: bash
 
-    javascript/build.py
+    javascript/build.py  # builds javascript/olm.js
+    npm pack javascript  # packages olm.js into olm-x.y.z.tgz
 
 Design
 ------