diff --git a/ops/nixos/totoro/default.nix b/ops/nixos/totoro/default.nix
index 5f1c81f196..b89c85eb03 100644
--- a/ops/nixos/totoro/default.nix
+++ b/ops/nixos/totoro/default.nix
@@ -67,5 +67,19 @@ in {
   networking.firewall.allowedTCPPorts = [ 111 2049 ];
   networking.firewall.allowedUDPPorts = [ 111 2049 ];
 
+  # Distributed builds!
+  nix.buildMachines = [ {
+    hostName = "whitby";
+    system = "x86_64-linux";
+    maxJobs = 64;
+    speedFactor = 2;
+    supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
+    mandatoryFeatures = [ ];
+  }] ;
+  nix.distributedBuilds = true;
+  nix.extraOptions = ''
+    builders-use-substitutes = true
+  '';
+
   system.stateVersion = "20.03";
 }