Re: Des url

buildinstall [--comp ] [--pkgorder ] [--version ] [--product ] [--release ] /path/to/build/root

--comp (not required)
Defaults to dist-7.0. This value is only used by the runroot command which is proprietary to RH and therefore is not required when used by regular users.

http://www.fedoraproject.org/wiki/AnacondaBuildInstall

Je crois que tu peux t'en passer. Courage, tu touches au but on dirait ;-)