Koragg [1] filed an orphan request for xinit-xsession [2]: the Latest Comment points out that the PKGBUILD installs its components incorrectly, and this issue has not been fixed, or even addressed at all, in well over a year.
[1] https://aur.archlinux.org/account/Koragg/ [2] https://aur.archlinux.org/pkgbase/xinit-xsession/