diff --git a/hosts/hydra/configuration.nix b/hosts/hydra/configuration.nix
index b76dab2e..b4b7a87d 100644
--- a/hosts/hydra/configuration.nix
+++ b/hosts/hydra/configuration.nix
@@ -22,6 +22,10 @@
 
   nixpkgs.config.allowUnfree = true;
 
+  security.acme = {
+    email = "mail@c3d2.de";
+    acceptTerms = true;
+  };
   security.pam.enableSSHAgentAuth = true;
 
   services.openssh = {
diff --git a/hosts/hydra/hydra.nix b/hosts/hydra/hydra.nix
index 5a187b71..f00d958f 100644
--- a/hosts/hydra/hydra.nix
+++ b/hosts/hydra/hydra.nix
@@ -15,8 +15,11 @@
       allowed-uris = http:// https://
     '';
     buildMachines = [{
-      hostName = "localhost";
+      hostName = "server7.hq";
+      sshUser = "hydra";
+      sshKey = "/var/lib/hydra/queue-runner/id_rsa";
       system = "x86_64-linux";
+      speedFactor = 2;
       supportedFeatures = [ "kvm" "nixos-test" "big-parallel" "benchmark" ];
       maxJobs = 8;
     }];
@@ -27,6 +30,7 @@
     hydraURL = "https://hydra.hq.c3d2.de";
     logo = ./c3d2.svg;
     notificationSender = "hydra@spam.works";
+    package = pkgs.hydra-unstable;
     useSubstitutes = false;
   };
 
diff --git a/hosts/server7/default.nix b/hosts/server7/default.nix
index bbe60f46..84e06653 100644
--- a/hosts/server7/default.nix
+++ b/hosts/server7/default.nix
@@ -154,4 +154,9 @@ in {
   time.timeZone = "Europe/Berlin";
 
   system.stateVersion = "19.09"; # Did you read the comment?
+
+  users.extraUsers.hydra.openssh.authorizedKeys.keys = [
+    # allow the old hydra to build here
+    "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC7HuDlyTlPC4rCjwhklY8kiYIxdgPhiu6wxs29ksnpKZmJa2R7qoD02N3ACm9cTb1GVkIWukAXI3KvU9h08+WLQJqUH0cHVBj3V1sDYmkN2QecE59gz3e1gfN3zPtwmQEUe6xvHWK3X3qdH45pGPUtxk1eDTZl45037C0NClWF7RXI4m6UXng4bL9wnPvoVqCI+ySsNWaTkHDLE/D9s/VrqGxJ1w2KiJb1F73g9/x/zjL8Ixb16wkPmLE0e50MQAQa7EMFTyPZoEskFnEviLYXM9pDexABAjJfbfZ39lLyMgVYGwnzEDbjDlm68dE6wQWUY1OV6wbt8uYreB2IRrlb root@hydra"
+  ];
 }