MarsSeed [1] filed a deletion request for crowd-greeter [2]: Upstream EOL since 2014 [a]; package is broken, unbuildable.
[a]: https://code.launchpad.net/~lightdm-team/crowd-greeter/trunk [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/crowd-greeter/
