diff --git a/nix/modules/base/darwin.nix b/nix/modules/base/darwin.nix
index 08ff97c..3391d98 100644
--- a/nix/modules/base/darwin.nix
+++ b/nix/modules/base/darwin.nix
@@ -21,6 +21,21 @@
       };
       options = "--delete-older-than 30d";
     };
+
+    linux-builder = {
+      enable = true;
+      maxJobs = 4;
+      config = {
+        virtualisation = {
+          darwin-builder = {
+            diskSize = 40 * 1024;
+            memorySize = 8 * 1024;
+          };
+          cores = 6;
+        };
+      };
+    };
+
     settings = {
       trusted-users = [
         "root"
@@ -43,7 +58,7 @@
     };
     onActivation = {
       autoUpdate = true;
-      cleanup = "zap";
+      cleanup = "none";
       upgrade = true;
     };
   };
diff --git a/nix/modules/builder/default.nix b/nix/modules/builder/default.nix
index 4c18991..aaf8b3b 100644
--- a/nix/modules/builder/default.nix
+++ b/nix/modules/builder/default.nix
@@ -6,7 +6,6 @@ _: {
         hostName = "plato";
         systems = [
           "x86_64-linux"
-          "aarch64-linux"
         ];
         maxJobs = 6;
         supportedFeatures = [