diff --git a/machines/common/darwin/default.nix b/machines/common/darwin/default.nix
index b7af75e..d6830e3 100644
--- a/machines/common/darwin/default.nix
+++ b/machines/common/darwin/default.nix
@@ -24,8 +24,6 @@
   # Auto upgrade nix package and the daemon service.
   services.nix-daemon.enable = true;
 
-  nix.linux-builder.enable = true;
-
   services = {
     sketchybar = {
       enable = true;
diff --git a/machines/sashimi/default.nix b/machines/sashimi/default.nix
index 88d6fd4..30fd7c7 100644
--- a/machines/sashimi/default.nix
+++ b/machines/sashimi/default.nix
@@ -10,4 +10,22 @@
     latitude = 48.210033;
     longitude = 16.363449;
   };
+
+  nix.buildMachines = [
+    {
+      hostName = "orb";
+      sshUser = "nixos";
+      supportedFeatures = [
+        "nixos-test"
+        "benchmark"
+        "big-parallel"
+        "kvm"
+        "gccarch-armv8-a"
+      ];
+      systems = [
+        "aarch64-linux"
+        "x86_64-linux"
+      ];
+    }
+  ];
 }