MarsSeed [1] filed a deletion request for gtkmm3-plplot-git [2]: Build is broken. Also upstream requires gtkmm-4.0, so this package is obsolete and should be deleted.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gtkmm3-plplot-git/
