On Mon, Dec 04, 2017 at 05:52:04PM +0100, m.othacehe@gmail.com wrote:
> From: Mathieu Othacehe <m.othacehe@gmail.com>
> 
> * gnu/build/vm.scm (load-in-linux-vm): "-net nic" option is
> deprecated, replace it with "-netdev" and "-device" options.
> 
> See https://wiki.qemu.org/Documentation/Networking.
> ---
>  gnu/build/vm.scm | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
> index 20ee127..9e868f6 100644
> --- a/gnu/build/vm.scm
> +++ b/gnu/build/vm.scm
> @@ -113,7 +113,8 @@ the #:references-graphs parameter of 'derivation'."
>    (unless (zero?
>             (apply system* qemu "-nographic" "-no-reboot"
>                    "-m" (number->string memory-size)
> -                  "-net" "nic,model=virtio"
> +                  "-device" "virtio-net-pci,netdev=mynet"
> +                  "-netdev" "user,id=mynet"

Does this work if you run multiple instances at one time? Or does the
'id' parameter need to be unique?