Bug reproducible steps undetermined, but it occurs after a few snap builds and I modify the snap/local/utilities/parts-nano-override-pull.bash script and start a non-clean rebuild. Crash signature: ``` shutil.Error: Cannot move a directory '/home/ubuntu/nano-snap/parts/utilities/install/assets' into itself '/home/ubuntu/nano-snap/parts/utilities/install/assets/utilities/'. ``` The full snap tree at the moment is attached, also the stack trace file.