diff --git a/flake.lock b/flake.lock
index faadbeea2..21c3ae0b6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,48 @@
 {
   "nodes": {
+    "buildbot-nix": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1717033539,
+        "narHash": "sha256-vWQLnmZSipvaosXnGze8aSqlEzaAF9PhA5sh2QYNvTc=",
+        "owner": "Mic92",
+        "repo": "buildbot-nix",
+        "rev": "ad165ae64f877adc6156b8f21c31fc74144dc8e4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "buildbot-nix",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "buildbot-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1715865404,
+        "narHash": "sha256-/GJvTdTpuDjNn84j82cU6bXztE0MSkdnTWClUCRub78=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "8dc45382d5206bd292f9c2768b8058a8fd8311d9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "nix-writers": {
       "flake": false,
       "locked": {
@@ -34,9 +77,31 @@
     },
     "root": {
       "inputs": {
+        "buildbot-nix": "buildbot-nix",
         "nix-writers": "nix-writers",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "buildbot-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1715940852,
+        "narHash": "sha256-wJqHMg/K6X3JGAE9YLM0LsuKrKb4XiBeVaoeMNlReZg=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "2fba33a182602b9d49f0b2440513e5ee091d838b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 516648849..d4f8b2b33 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,15 +7,18 @@
     };
     # disko.url = "github:nix-community/disko";
     # disko.inputs.nixpkgs.follows = "nixpkgs";
+    buildbot-nix.url = "github:Mic92/buildbot-nix";
+    buildbot-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
 
   description = "stockholm";
 
-  outputs = { self, nixpkgs, nix-writers }: {
+  outputs = { self, nixpkgs, nix-writers, buildbot-nix, ... }@inputs: {
     nixosConfigurations = nixpkgs.lib.mapAttrs (machineName: _: nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       specialArgs.stockholm = self;
       specialArgs.nix-writers = nix-writers;
+      specialArgs.buildbot-nix = buildbot-nix;
       modules = [
         ./krebs/1systems/${machineName}/config.nix
         {
diff --git a/kartei/makefu/default.nix b/kartei/makefu/default.nix
index d6134cd8d..6dd59be55 100644
--- a/kartei/makefu/default.nix
+++ b/kartei/makefu/default.nix
@@ -211,6 +211,7 @@ in {
           bookmark.euer     IN A      ${nets.internet.ip4.addr}
           boot              IN A      ${nets.internet.ip4.addr}
           boot.euer         IN A      ${nets.internet.ip4.addr}
+          build.euer     IN A      ${nets.internet.ip4.addr}
           cache.euer        IN A      ${nets.internet.ip4.addr}
           cache.gum         IN A      ${nets.internet.ip4.addr}
           cgit.euer         IN A      ${nets.internet.ip4.addr}
diff --git a/krebs/1systems/hotdog/config.nix b/krebs/1systems/hotdog/config.nix
index 0a103ed1a..91071ec85 100644
--- a/krebs/1systems/hotdog/config.nix
+++ b/krebs/1systems/hotdog/config.nix
@@ -6,7 +6,6 @@
     ../../../krebs/2configs
     ../../../krebs/2configs/nginx.nix
 
-    ../../../krebs/2configs/buildbot-stockholm.nix
     ../../../krebs/2configs/binary-cache/nixos.nix
     ../../../krebs/2configs/ircd.nix
     ../../../krebs/2configs/reaktor2.nix
@@ -15,6 +14,10 @@
     ../../../krebs/2configs/mud.nix
     ../../../krebs/2configs/repo-sync.nix
 
+    ../../../krebs/2configs/buildbot-stockholm.nix
+    #../../../krebs/2configs/buildbot/master.nix
+    #../../../krebs/2configs/buildbot/worker.nix
+
     ../../../krebs/2configs/cal.nix
     ../../../krebs/2configs/mastodon.nix
 
diff --git a/krebs/2configs/buildbot/master.nix b/krebs/2configs/buildbot/master.nix
new file mode 100644
index 000000000..9598f6fa0
--- /dev/null
+++ b/krebs/2configs/buildbot/master.nix
@@ -0,0 +1,33 @@
+{buildbot-nix,...}:
+let
+  #domain = "buildbot.krebsco.de";
+  domain = "build.hotdog.r";
+in {
+  imports = [
+    buildbot-nix.nixosModules.buildbot-master
+  ];
+
+  #services.nginx.virtualHosts."${domain}" = {
+  #  enableACME = true;
+  #  forceSSL = true;
+  #};
+
+
+  services.buildbot-nix.master = {
+    enable = true;
+    admins = [ "makefu" ];
+    buildSystems = [ "x86_64-linux" "aarch64-linux" ];
+    inherit domain;
+    evalMaxMemorySize = "4096";
+    evalWorkerCount = 16;
+    workersFile = "/var/src/secrets/buildbot/nix-workers";
+    github = {
+      tokenFile = "/var/src/secrets/buildbot/github-token";
+      webhookSecretFile = "/var/src/secrets/buildbot/github-webhook-secret";
+      oauthSecretFile = "/var/src/secrets/buildbot/github-oauth-secret";
+      oauthId = "Ov23lizFP7t7qoE9FuDA";
+      user = "krebs-bob";
+      topic = "buildbot";
+    };
+  };
+}
diff --git a/krebs/2configs/buildbot/worker.nix b/krebs/2configs/buildbot/worker.nix
new file mode 100644
index 000000000..e96c6df14
--- /dev/null
+++ b/krebs/2configs/buildbot/worker.nix
@@ -0,0 +1,11 @@
+{ buildbot-nix, ... }:
+{
+  imports = [
+    buildbot-nix.nixosModules.buildbot-worker
+  ];
+
+  services.buildbot-nix.worker = {
+    enable = true;
+    workerPasswordFile = "/var/src/secrets/nix-worker-file";
+  };
+}
diff --git a/krebs/2configs/default.nix b/krebs/2configs/default.nix
index 5d64555c8..6ca7c732a 100644
--- a/krebs/2configs/default.nix
+++ b/krebs/2configs/default.nix
@@ -28,7 +28,7 @@ with import ../../lib/pure.nix { inherit lib; };
   networking.hostName = config.krebs.build.host.name;
 
   nix.maxJobs = 1;
-  nix.useSandbox = true;
+  nix.settings.sandbox = true;
 
   environment.systemPackages = with pkgs; [
     git
diff --git a/krebs/2configs/matterbridge.nix b/krebs/2configs/matterbridge.nix
index f42921824..aa33f748f 100644
--- a/krebs/2configs/matterbridge.nix
+++ b/krebs/2configs/matterbridge.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, ...  }: {
+{ pkgs, lib, config, ...  }: {
   services.matterbridge = {
     enable = true;
     configPath = let