I think the first line of your PKGBUILD might be the clue!
I could be wrong though, just guessing.
On 30 June 2014 17:30, Mike Hobbs email@example.com wrote:
I maintain the xorg-server-bug54168 package in AUR, which is a replacement for xorg-server that contains a small bug fix that upstream is not addressing. Anyway, when I submit a new version for the xorg-server 1.15.2 update, it tells me that "xorg-server is on the package blacklist, please check if it's available in the official repos". I've not seen this error before when updating my package. Is there any documentation about what this blacklist is, or how to avoid it, or how to petition for an override? I've done the standard searches, but have only come across random forum and mail list posts; nothing comprehensive.