caltlgin [1] filed a deletion request for aes [2]: The AUR is not the place to host individual source files. You need to utilize the "source" array to pull in a "release" or in the case of a -git package; a git url.
[1] https://aur.archlinux.org/account/caltlgin/ [2] https://aur.archlinux.org/pkgbase/aes/
