flu  filed a deletion request for boost-devel :
Superseded by the one in the repos.
 https://aur.archlinux.org/account/flu/  https://aur.archlinux.org/pkgbase/boost-devel/
Request #658 has been accepted by arcanis :
I didn't find boost-svn package into AUR. So if someone wants to create the devel package, he should upload *-svn. The repository maybe found here: