I saw the other Unity packages in the AUR archives that you were speaking of. I believe those packages were based on an attempt to build Unity8 for Arch by Chenxiaolong. He abandoned that project quite a while ago.

Mike

On Tue, Mar 6, 2018, 12:24 PM Michael Healy <horsemanoffaith@gmail.com> wrote:
I have never tried to build lightdm-unity-greeter without using lightdm-ubuntu. I believe it requires the Ubuntu patches for the greeter to work correctly. lightdm-ubuntu is currently in the AUR. I maintain that package as well.

On Tue, Mar 6, 2018, 12:16 PM Alad Wenter via aur-requests <aur-requests@archlinux.org> wrote:
> Eli Schwartz via aur-requests <aur-requests@archlinux.org> hat am 6. März 2018 um 21:10 geschrieben:
>
>
> On 03/06/2018 02:58 PM, Michael Healy via aur-requests wrote:
> > Trusted User Alad has requested deletion of lightdm-unity-greeter and
> > unity-settings-daemon. The notes on the deletion request say that the
> > packages specifically point to the Unity DE, which is not on the AUR.
> > Lightdm-unity-greeter can be used outside of the Unity desktop
> > environment. I have used Cinnamon and other DE's, but have used
> > lightdm-unity-greeter as my chosen greeter, without Unity being fully
> > installed. Unity-settings-daemon is a dependency of
> > lightdm-unity-greeter, so I am asking that these packages be left on the
> > AUR for community use.
>
> At least the former has been out of date for over a year. It may not be
> Unity-specific, but it is unmaintained...
>
After the request on cmake30, I was going over a bunch of Unity stuff which were submitted to AUR but have been broken and abandoned for years. This one didn't look different to me. If you say it works outside unity, does it work with upstream lightdm too or only with lightdm-ubuntu?

Alad