diff --git a/bert/configuration.nix b/bert/configuration.nix
index 5f46d8b..d3d4d92 100644
--- a/bert/configuration.nix
+++ b/bert/configuration.nix
@@ -19,6 +19,7 @@
     availableKernelModules = [ "e1000e" ];
     network = {
       enable = true;
+      flushBeforeStage2 = true; # Without this, stage2 IPv6 config is messed up?
       ssh = {
         enable = true;
         port = 22;