TOTBWF [1] filed a orphan request for haskell-ide-engine-git [2]:

The maintainer has not made any fixes for quite a while. I have a working PKGBUILD, and would be willing to assume maintainership.

[1] https://aur.archlinux.org/account/TOTBWF/ [2] https://aur.archlinux.org/pkgbase/haskell-ide-engine-git/