diff --git a/doc/migrating-storage-device.md b/doc/migrating-storage-device.md
index 3d97297db..94fecc909 100644
--- a/doc/migrating-storage-device.md
+++ b/doc/migrating-storage-device.md
@@ -34,4 +34,11 @@ $ sudo btrfs subvolume create new/persist
 $ rsync -arv old/persist/ new/persist/
 ```
 
-5. insert the disk into the system, and boot!
+5. ensure/fix ownership
+```
+$ chmod -R a+rX new/nix
+# or, let the nix daemon do it:
+$ nix copy --no-check-sigs --to new $(nix-build -A hosts.moby)
+```
+```
+6. insert the disk into the system, and boot!