- found a way to fix this in deepin pkgs

my first modfied systemd service

thanks @Kirek for explaining.
i have just looked up "pacman-mirrors --help" and see you are right.

now, it should be ready for merge.

IMHO, "Before=systemd-user-sessions.service" is not needed any longer, because pacman-mirrors will run whenever a network connection is established.
"Before=systemd-user-sessions.service"  might even delay the boot process.

service start after a network connection has been established. this ensures that pacman-mirrors can work properly.