Or even build a systemd unit to execute the command on login.
Yes, sometimes a workaround is neccessary. ut there are workarounds that’ll break your Manjaro when you forget about it (had this not too long ago, see Unable to log in after update, both X and Wayland. (First time in more than two years!) - #95 by Mirdarthos, it was caused by exactly this) and there are better ones.
If you’re in a partially updated state, you are completely on your own, it is neither recommended nor supported.