mh4ckwascut [1] filed a deletion request for xiaomi-adb-fastboot-tools [2]:
The upstream repo have been deleted, package not installable anymore. https://github.com/Szaki/XiaomiADBFastbootTools [1] https://aur.archlinux.org/account/mh4ckwascut/ [2] https://aur.archlinux.org/pkgbase/xiaomi-adb-fastboot-tools/
