[[https://qemu.weilnetz.de/doc/qemu-doc.html#Network-options]], I see no way to tell `-net default` to QEMU.
yeah but the GuixSD install manual uses it, https://www.gnu.org/software/guix/manual/html_node/Installing-GuixSD-in-a-VM.html#Installing-GuixSD-in-a-VM so somebody must have gotten it to work presumably.
