Backup list of packages installed on Arch

backup-package-list

Install the following files in ~/.config/systemd/user to backup a list of packages installed via pacman. 
I copy to Nextcloud so I have a remove copy in case I need to reinstall.

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# backup-package-list.timer 

[Unit]
Description=Create a list of installed packages
Documentation=Make a backup of packages installed with pacman right after login and then once per day

[Timer]
OnStartupSec=45
OnUnitActiveSec=1d

[Install]
WantedBy=default.target

---

# backup-package-list.service

[Unit]
Description=Backup list of packages installed by pacman

[Service]
Type=oneshot
StandardOutput=file:%h/Nextcloud/Backups/%H/packages.txt
ExecStart=pacman -Qqe