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-rw-r--r--nixos/lib/qemu-flags.nix8
1 files changed, 6 insertions, 2 deletions
diff --git a/nixos/lib/qemu-flags.nix b/nixos/lib/qemu-flags.nix
index 6f61c64a832e..f115ca5ac000 100644
--- a/nixos/lib/qemu-flags.nix
+++ b/nixos/lib/qemu-flags.nix
@@ -1,11 +1,15 @@
 # QEMU flags shared between various Nix expressions.
 { pkgs }:
 
+let
+  zeroPad = n: if n < 10 then "0${toString n}" else toString n;
+in
+
 {
 
   qemuNICFlags = nic: net: machine:
-    [ "-net nic,vlan=${toString nic},macaddr=52:54:00:12:${toString net}:${toString machine},model=virtio"
-      "-net vde,vlan=${toString nic},sock=$QEMU_VDE_SOCKET_${toString net}"
+    [ "-device virtio-net-pci,netdev=vlan${toString nic},mac=52:54:00:12:${zeroPad net}:${zeroPad machine}"
+      "-netdev vde,id=vlan${toString nic},sock=$QEMU_VDE_SOCKET_${toString net}"
     ];
 
   qemuSerialDevice = if pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64 then "ttyS0"