diff --git a/ops/nixos/marukuru/default.nix b/ops/nixos/marukuru/default.nix
index b21a377b55..6369f2cc68 100644
--- a/ops/nixos/marukuru/default.nix
+++ b/ops/nixos/marukuru/default.nix
@@ -26,7 +26,7 @@ in {
   # Use GRUB2.
   boot.loader.grub.enable = true;
   boot.loader.grub.version = 2;
-  boot.loader.grub.device = "/dev/sda";
+  boot.loader.grub.device = "/dev/vda";
 
   # Networking!
   networking = {