diff --git a/darwin/base/nix.nix b/darwin/base/nix.nix
index 021b8eff..12430d4f 100644
--- a/darwin/base/nix.nix
+++ b/darwin/base/nix.nix
@@ -8,6 +8,9 @@
       ci.flake = inputs.ci;
     };
     package = pkgs.nixUnstable;
+    binaryCaches = [ "https://arc.cachix.org" "https://kittywitch.cachix.org" "https://nix-community.cachix.org" ];
+    binaryCachePublicKeys =
+        [ "arc.cachix.org-1:DZmhclLkB6UO0rc0rBzNpwFbbaeLfyn+fYccuAy7YVY=" "kittywitch.cachix.org-1:KIzX/G5cuPw5WgrXad6UnrRZ8UDr7jhXzRTK/lmqyK0=" "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=" "ryantrinkle.com-1:JJiAKaRv9mWgpVAz8dwewnZe0AzzEAzPkagE9SP5NWI=" ];
     extraOptions = ''
       experimental-features = nix-command flakes
       keep-derivations = true
diff --git a/darwin/systems/sumireko.nix b/darwin/systems/sumireko.nix
index 85375dd5..35ba57dd 100644
--- a/darwin/systems/sumireko.nix
+++ b/darwin/systems/sumireko.nix
@@ -4,9 +4,52 @@
     darwin.base
     darwin.kat
   ];
-  
+
   security.pam.enableSudoTouchIdAuth = true;
 
+  home-manager.users.root.programs.ssh = {
+    enable = true;
+    matchBlocks = {
+      "daiyousei-build" = {
+        hostname = "daiyousei.kittywit.ch";
+        port = 62954;
+        user = "root";
+      };
+      "renko-build" = {
+        hostname = "192.168.64.3";
+        port = 62954;
+        user = "root";
+      };
+    };
+  };
+
+  nix = {
+    envVars = {
+        "SSH_AUTH_SOCK" = "/Users/kat/.gnupg/S.gpg-agent.ssh";
+    };
+    buildMachines = [
+      {
+        hostName = "renko-build";
+        sshUser = "root";
+        system = "x86_64-linux";
+        maxJobs = 100;
+        speedFactor = 1;
+        supportedFeatures = [ "benchmark" "big-parallel" "kvm" ];
+        mandatoryFeatures = [ ];
+      }
+      {
+        hostName = "daiyousei-build";
+        sshUser = "root";
+        system = "aarch64-linux";
+        maxJobs = 100;
+        speedFactor = 1;
+        supportedFeatures = [ "benchmark" "big-parallel" "kvm" ];
+        mandatoryFeatures = [ ];
+      }
+    ];
+    distributedBuilds = true;
+  };
+
   homebrew = {
     brewPrefix = "/opt/homebrew/bin";
     casks = [
@@ -18,11 +61,12 @@
       "utm"
       "mullvadvpn"
       "bitwarden"
-    ];
-    masApps = {
-      Tailscale = 1475387142;
+      "gimp"
+      ];
+      masApps = {
+        Tailscale = 1475387142;
+      };
     };
-  };
 
   environment.systemPackages = with pkgs; [
     terraform
diff --git a/home/shell/packages.nix b/home/shell/packages.nix
index 9ad9c91b..89e59101 100644
--- a/home/shell/packages.nix
+++ b/home/shell/packages.nix
@@ -1,5 +1,8 @@
 { config, pkgs, ... }: {
   home.packages = with pkgs; [
+    # task managers
+    htop
+    btop
     # disk usage 
     duc-cli
     # nix formatting
diff --git a/nixos/base/locale.nix b/nixos/base/locale.nix
index 12ded209..85a17263 100644
--- a/nixos/base/locale.nix
+++ b/nixos/base/locale.nix
@@ -9,6 +9,7 @@
     supportedLocales = [
       "en_CA.UTF-8/UTF-8"
       "en_GB.UTF-8/UTF-8"
+      "en_US.UTF-8/UTF-8"
     ];
   };
   console = {
diff --git a/nixos/systems/renko.nix b/nixos/systems/renko.nix
new file mode 100644
index 00000000..d104e522
--- /dev/null
+++ b/nixos/systems/renko.nix
@@ -0,0 +1,53 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [
+      (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+
+    deploy.tf = {
+      resources.renko = {
+        provider = "null";
+        type = "resource";
+        connection = {
+          port = builtins.head config.services.openssh.ports;
+          host = "192.168.64.3";
+        };
+      };
+    };
+
+  boot = {
+    loader = {
+      systemd-boot.enable = true;
+      efi.canTouchEfiVariables = true;
+    };
+    initrd = {
+      availableKernelModules = [ "ehci_pci" "uhci_hcd" "ahci" "usbhid" "sd_mod" "sr_mod" ];
+      kernelModules = [ ];
+    };
+    kernelModules = [ "kvm-amd" ];
+    extraModulePackages = [ ];
+  };
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-uuid/a4b4dea9-dd55-4055-9c98-49349ec43e5c";
+      fsType = "ext4";
+    };
+  "/boot" = {
+      device = "/dev/disk/by-uuid/957B-56F1";
+      fsType = "vfat";
+    };
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-uuid/59399595-6a74-480c-b98c-e356761c0861"; }
+  ];
+
+  networking.useDHCP = lib.mkDefault true;
+
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault false;
+
+  system.stateVersion = "22.05";
+}