diff --git a/setup/setup.py b/setup/setup.py
index da8f815f8..e367b1b9e 100644
--- a/setup/setup.py
+++ b/setup/setup.py
@@ -3,10 +3,17 @@
 
 import os
 
+if not os.path.exists(os.path.join(os.getcwd(), 'data', 'dist',
+    'brython_modules.js')):
+        print('/data/dist/brython_modules.js not present. Use'
+            ' /data/prepare_setup.py to generate it')
+        import sys
+        sys.exit()
+
 setup(
     name='brython',
 
-    version='3.2.9',
+    version='0.0.2',
 
     description='Brython is an implementation of Python 3 running in the browser',