Reported by Alex Kost <alezost@gmail.com>
at <http://lists.gnu.org/archive/html/guix-devel/2015-02/msg00702.html>.
* guix/ui.scm (parse-command-line)[parse-options-from]: Add 'seeds'
parameter.
Thread the result of the first 'parse-options-from' call to the
second.