MarsSeed [1] filed an orphan request for xperia-flashtool-git [2]: Package is unmaintained since the beginning of 2021.
Build failures were reported as early as 2021-03. Since then, many different issues have accumulated, as evidenced by comments made during the last 2 years. It is time to open up the possibility for someone else to take over this package. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/xperia-flashtool-git/
