diff --git a/build/hydra.nix b/build/hydra.nix
index 64456e71..281bea83 100644
--- a/build/hydra.nix
+++ b/build/hydra.nix
@@ -151,6 +151,8 @@ in
     # x86_64-linux at Hetzner
     "elated-minsky.builder.nixos.org".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIvrJpd3aynfPVGGG/s7MtRFz/S6M4dtqvqKI3Da7O7+";
     "sleepy-brown.builder.nixos.org".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOh4/3m7o6H3J5QG711aJdlSUVvlC8yW6KoqAES3Fy6I";
+    # aarch64-linux at Hetzner
+    "goofy-hopcroft.builder.nixos.org".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICTJEi+nQNd7hzNYN3cLBK/0JCkmwmyC1I+b5nMI7+dd";
 
     # M1 Macs in North America
     "*.foundation.detsys.dev" = {
diff --git a/build/pluto/prometheus/exporters/node.nix b/build/pluto/prometheus/exporters/node.nix
index 0867a79d..4bb0717b 100644
--- a/build/pluto/prometheus/exporters/node.nix
+++ b/build/pluto/prometheus/exporters/node.nix
@@ -47,6 +47,7 @@
             targets = [
               "elated-minsky.builder.nixos.org:9100"
               "sleepy-brown.builder.nixos.org:9100"
+              "goofy-hopcroft.builder.nixos.org:9100"
             ];
           }
         ];
diff --git a/builders/flake-module.nix b/builders/flake-module.nix
index 7d838aa8..9c08feb7 100644
--- a/builders/flake-module.nix
+++ b/builders/flake-module.nix
@@ -30,5 +30,8 @@
       # Epyc 9454P (48C/96T), 256 GB DDR4 RAM, 2x 1.92TB PCIe4 NVME
       elated-minsky = mkNixOS "x86_64-linux" ./instances/elated-minsky.nix;
       sleepy-brown = mkNixOS "x86_64-linux" ./instances/sleepy-brown.nix;
+
+      # Ampere Q80-30 (80C), 256 GB DDR4 RAM, 2x3.84TB PCIe4 NVME
+      goofy-hopcroft = mkNixOS "aarch64-linux" ./instances/goofy-hopcroft.nix;
     };
 }
diff --git a/builders/instances/goofy-hopcroft.nix b/builders/instances/goofy-hopcroft.nix
new file mode 100644
index 00000000..d2b57953
--- /dev/null
+++ b/builders/instances/goofy-hopcroft.nix
@@ -0,0 +1,40 @@
+{
+  imports = [
+    ../profiles/hetzner-rx220.nix
+  ];
+
+  nix.settings = {
+    cores = 2;
+    max-jobs = 40;
+  };
+
+  networking = {
+    hostName = "goofy-hopcroft";
+    domain = "builders.nixos.org";
+    useDHCP = false;
+  };
+
+  systemd.network = {
+    enable = true;
+    networks = {
+      "30-enP3p2s0f0" = {
+        matchConfig = {
+          MACAddress = "74:56:3c:8c:01:a9";
+          Type = "ether";
+        };
+        linkConfig.RequiredForOnline = true;
+        networkConfig.Description = "WAN";
+        address = [
+          "135.181.225.104/26"
+          "2a01:4f9:3071:2d8b::1/64"
+        ];
+        routes = [
+          { Gateway = "135.181.225.65"; }
+          { Gateway = "fe80::1"; }
+        ];
+      };
+    };
+  };
+
+  system.stateVersion = "24.11";
+}
diff --git a/builders/profiles/hetzner-rx220.nix b/builders/profiles/hetzner-rx220.nix
new file mode 100644
index 00000000..19610a67
--- /dev/null
+++ b/builders/profiles/hetzner-rx220.nix
@@ -0,0 +1,20 @@
+{
+  imports = [
+    ../boot/efi-grub.nix
+  ];
+
+  disko.devices = import ../disk-layouts/efi-zfs-raid0.nix { };
+  boot.supportedFilesystems.zfs = true;
+  networking.hostId = "91312b0a";
+
+  # 96G for build roots, 160G for working memory
+  boot.tmp = {
+    useTmpfs = true;
+    tmpfsSize = "96G";
+  };
+
+  boot.initrd.availableKernelModules = [
+    "nvme"
+    "usbhid"
+  ];
+}
diff --git a/terraform/dns.tf b/terraform/dns.tf
index 118425f1..514494ac 100644
--- a/terraform/dns.tf
+++ b/terraform/dns.tf
@@ -228,6 +228,16 @@ locals {
       type     = "AAAA"
       value    = "2a01:4f8:271:5c14::1"
     },
+    {
+      hostname = "goofy-hopcroft.builder.nixos.org"
+      type     = "A"
+      value    = "135.181.225.104"
+    },
+    {
+      hostname = "goofy-hopcroft.builder.nixos.org"
+      type     = "AAAA"
+      value    = "2a01:4f9:3071:2d8b::1"
+    },
     {
       # hetzner m1 1638981
       hostname = "intense-heron.mac.nixos.org"