MarsSeed [1] filed a deletion request for scantailor-git [2]: Dead package, see last comment from 2022.
Code was last changed in 2016; repo is archived. [a] Superseded by scantailor-advanced. Available in Arch extra repo [b], and on AUR as a Git VCS build. [c] [a]: https://github.com/scantailor/scantailor/commits/master [b]: https://archlinux.org/packages/?q=scantailor-advanced [c]: https://aur.archlinux.org/pkgbase/scantailor-advanced-git [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/scantailor-git/
