{ ... }:

{

  nix = {
    distributedBuilds = true;
    buildMachines = [
      {
        hostName = "hydra-1.net.clerie.de";
        sshUser = "root";
        systems = [
          "x86_64-linux"
          "armv6l-linux"
          "armv7l-linux"
          "aarch64-linux"
        ];
        sshKey = "/var/lib/hydra/id_ed25519";
      }
      {
        hostName = "hydra-2.net.clerie.de";
        sshUser = "root";
        systems = [
          "x86_64-linux"
          "armv6l-linux"
          "armv7l-linux"
          "aarch64-linux"
        ];
        sshKey = "/var/lib/hydra/id_ed25519";
      }
    ];
  };

  programs.ssh.knownHosts."hydra-1.net.clerie.de".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE2xQBCsFBCwL9n4OP/bPngtNO1fy9kPw13Z/NDoba16 root@hydra-1";
  programs.ssh.knownHosts."hydra-2.net.clerie.de".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDZED9QM+qe7sB6R6atvP6WNaI2sC2nh7TTsD6kgRpnr root@hydra-2";

}