diff --git a/zuul/launcher/ansiblelaunchserver.py b/zuul/launcher/ansiblelaunchserver.py
index be4348a..11bcf79 100644
--- a/zuul/launcher/ansiblelaunchserver.py
+++ b/zuul/launcher/ansiblelaunchserver.py
@@ -24,6 +24,7 @@
 import threading
 import time
 import traceback
+import uuid
 import Queue
 
 import gear
@@ -1269,7 +1270,7 @@
 
     def _makeBuilderTask(self, jobdir, builder, parameters, sequence):
         tasks = []
-        script_fn = '%02d.sh' % sequence
+        script_fn = '%02d-%s.sh' % (sequence, str(uuid.uuid4().hex))
         script_path = os.path.join(jobdir.script_root, script_fn)
         with open(script_path, 'w') as script:
             data = builder['shell']