diff --git a/osbuild/mounts.py b/osbuild/mounts.py
index 2b905294..7f46b89c 100644
--- a/osbuild/mounts.py
+++ b/osbuild/mounts.py
@@ -63,9 +63,11 @@ class MountManager:
 
         args = {
             "source": source,
-            "root": self.root,
             "target": mount.target,
 
+            "root": self.root,
+            "tree": self.devices.tree,
+
             "options": mount.options,
         }