MarsSeed [1] filed an orphan request for camlp5-transitional-git [2]: Broken, but also unneeded.
camlp5 is a full release now, not a transitional one. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/camlp5-transitional-git/
