diff --git a/api/controller/sdk.py b/api/controller/sdk.py
index 37d3919..8a3d12b 100644
--- a/api/controller/sdk.py
+++ b/api/controller/sdk.py
@@ -119,7 +119,7 @@
 def Clean(input_proto, _output_proto, _config):
   """Clean unneeded files from a chroot."""
   chroot = controller_util.ParseChroot(input_proto.chroot)
-  sdk.Clean(chroot, images=True, sysroots=True, tmp=True)
+  sdk.Clean(chroot, safe=True, sysroots=True)
 
 
 @faux.all_empty