diff --git a/BuildBotLib/make.py b/BuildBotLib/make.py
index 999328f..9a6f7c9 100644
--- a/BuildBotLib/make.py
+++ b/BuildBotLib/make.py
@@ -236,10 +236,10 @@ class Make(BaseModule):
         factory = super().getFactory()
 
         if isWin():
-            factory.addSteps([self.generateStep(["rm", "*", "-rdf"],
+            factory.addStep(self.generateStep(["rm", "*", "-rdf"],
                                           self.platform,
                                           'clear work dir',
-                                          lambda step: True)]
+                                          lambda step: True))
 
         factory.addStep(
             steps.Git(