sudo mkdir -p created the .config/pipewire/pipewire.conf.d directories
owned by root, causing the subsequent sudo -u kiosk tee to fail with
"Permission denied" at step [5.5/27] on a fresh install.
Switching to sudo -u kiosk mkdir -p ensures the directories are owned
by the kiosk user before the tee writes into them.
https://claude.ai/code/session_01EyjEQLWbTXcZgbMDarf7NU