[arch-general] How to disable systemd-tmpfiles-clean.timer

Since a recent update (I have first noticed a couple of weeks ago this new systemd enhancement), systemd started to automatically clean /tmp directory daily. This is not something that I like as I prefer to decide when to clean up and to manually perform the clean up. I have tried systemctl stop systemd-tmpfiles-clean.timer systemctl disable systemd-tmpfiles-clean.timer The disabling apparently did not survived a reboot and the undesired systemd service came back. I guess that I could mess with tmpfiles-clean config file but I am just not interested in the service at all. What is the sure way method to disable it for good? thank you,