diff --git a/configurations.nix b/configurations.nix
index 550d0fd..f14c0a0 100644
--- a/configurations.nix
+++ b/configurations.nix
@@ -36,6 +36,7 @@ let
     ./modules/network.nix
     ./modules/zsh.nix
     ./modules/ssh-cursed.nix
+    ./modules/buildbot
 
 
     disko.nixosModules.disko
diff --git a/hosts/epyc.nix b/hosts/epyc.nix
index 805fa33..b41c69a 100644
--- a/hosts/epyc.nix
+++ b/hosts/epyc.nix
@@ -18,6 +18,8 @@
     };
   };
 
+  boot.binfmt.emulatedSystems = [ "aarch64-linux" "riscv64-linux" ];
+
   simd.arch = "znver3";
   system.stateVersion = "23.05";
 }
diff --git a/modules/buildbot/default.nix b/modules/buildbot/default.nix
index 5b0caa5..3691eab 100644
--- a/modules/buildbot/default.nix
+++ b/modules/buildbot/default.nix
@@ -28,14 +28,14 @@ in
     after = [ "network.target" "buildbot-master.service" ];
     wantedBy = [ "multi-user.target" ];
     path = [
-      pkgs.unstable.nix-eval-jobs
+      pkgs.nix-eval-jobs
       pkgs.git
       pkgs.gh
       pkgs.nix
       pkgs.nix-output-monitor
     ];
     environment.PYTHONPATH = "${python.withPackages (_: [package])}/${python.sitePackages}";
-    environment.MASTER_URL = ''tcp:host=ci.julienmalka.me'';
+    environment.MASTER_URL = ''TCP:2a01\\:e34\\:ec2a\\:8e60\\:8ec7\\:b5d2\\:f663\\:a67a:9989'';
     environment.BUILDBOT_DIR = buildbotDir;
     environment.WORKER_PASSWORD_FILE = "/var/lib/buildbot-worker/password.txt";
 
diff --git a/modules/buildbot/worker.py b/modules/buildbot/worker.py
index a640eff..198dfae 100644
--- a/modules/buildbot/worker.py
+++ b/modules/buildbot/worker.py
@@ -34,13 +34,12 @@ def setup_worker(application: service.Application, id: int) -> None:
     allow_shutdown = None
 
     s = Worker(
-        None,
-        None,
+        "2a01:e34:ec2a:8e60:8ec7:b5d2:f663:a67a",
+        9989,
         workername,
         passwd,
         basedir,
         keepalive,
-        connection_string=master_url,
         umask=umask,
         maxdelay=maxdelay,
         numcpus=numcpus,