diff --git a/scripts/prepare-distribution.py b/scripts/prepare-distribution.py
index <HASH>..<HASH> 100755
--- a/scripts/prepare-distribution.py
+++ b/scripts/prepare-distribution.py
@@ -8,6 +8,7 @@ try:
 except KeyError:
     pass
 
+os.environ['CASS_DRIVER_NO_CYTHON'] = '1'
 sys.path.insert(0, '../')
 from eventsourcing import __version__
Made "prepare release" script faster.