MarsSeed [1] filed a deletion request for kawanime-git [2]: Dead. Was EOL for 4 years and already failed to build a year ago.
Now sources are no longer available on GitHub due to DMCA takedown. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kawanime-git/
