diff --git a/ops/nixos/lib/blade.nix b/ops/nixos/lib/blade.nix
index ee66b912ec..4c23ce687c 100644
--- a/ops/nixos/lib/blade.nix
+++ b/ops/nixos/lib/blade.nix
@@ -158,6 +158,17 @@ in {
       Storage=none
       ProcessSizeMax=0
     '';
+
+    # Enable serial console.
+    loader.grub.extraConfig = ''
+      serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1
+      terminal_input console serial
+      terminal_output console serial
+    '';
+    boot.kernelParams = [
+      "console=tty1"
+      "console=ttyS0,115200"  # <-- /dev/console
+    ];
   
     system.stateVersion = "21.05";
   };