+if [ -z "${builddir:-}" ]; then
+ builddir=${builddir:-$basedir}
+ for u in schroot-unpack unpack; do
+ # if one of these directories exists and is on a different filesystem, prefer it.
+ candidate="$builddir/$u"
+ if [ -e "$candidate" ] &&
+ [ "$(stat -f --printf '%i\n' "$builddir" )" != "$(stat -f --printf '%i\n' "$candidate")" ]; then
+ builddir="$candidate"
+ fi
+ done
+fi