diff --git a/modules/nixos/system.nix b/modules/nixos/system.nix
index 94a24d2..dedae10 100644
--- a/modules/nixos/system.nix
+++ b/modules/nixos/system.nix
@@ -182,4 +182,44 @@ in
     maxretry = 5;
     bantime = "1h";
   };
+
+  nix = {
+    distributedBuilds = true;
+
+    buildMachines = [
+      {
+        hostName = "linux-builder";
+        protocol = "ssh-ng";
+        sshUser = "builder";
+        sshKey = "/etc/nix/builder_ed25519";
+        publicHostKey = "c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSUpCV2N4Yi9CbGFxdDFhdU90RStGOFFVV3JVb3RpQzVxQkorVXVFV2RWQ2Igcm9vdEBuaXhvcwo=";
+        systems = [
+          "aarch64-linux"
+          "x86_64-linux"
+        ];
+        maxJobs = 1;
+        supportedFeatures = [
+          "kvm"
+          "benchmark"
+          "big-parallel"
+        ];
+      }
+    ];
+
+    settings.builders-use-substitutes = true;
+  };
+
+  programs.ssh = {
+    extraConfig = ''
+      Host linux-builder
+        User builder
+        HostName ramen.char-ruler.ts.net
+        HostKeyAlias linux-builder
+        Port 31023
+        IdentityFile /etc/nix/builder_ed25519
+        IdentitiesOnly yes
+    '';
+
+    knownHosts.linux-builder.publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJBWcxb/Blaqt1auOtE+F8QUWrUotiC5qBJ+UuEWdVCb";
+  };
 }