I ran into this:
$this->bbcode_second_pass_code('', '(69/75) upgrading systemd-sysvcompat [#########################################################################] 100%
(70/75) upgrading uboot-odroid-c2 [#########################################################################] 100%
warning: /boot/boot.ini installed as /boot/boot.ini.pacnew
A new U-Boot version needs to be flashed onto /dev/mmcblk0.
Do you want to do this now? [y|N]
packet_write_wait: Connection to fe80::21e:6ff:fe33:a26b%en0 port 22: Broken pipe')
So, how do I resume this? I guess new uboot hasn't been flashed now? Running pacman again only finished the remaining 5 packages, but skipped the "uboot-odroid-c2" package.