{ pkgs, ... }:

{
  # Install the remote builder key on each client host (do not commit private keys):
  #   sudo install -d -m 0700 /root/.ssh
  #   sudo install -m 0600 ./nixremote /root/.ssh/nixremote
  #   sudo ssh -i /root/.ssh/nixremote nixremote@nix-cache nix-store --version
  nix.distributedBuilds = true;

  nix.buildMachines = [
    {
      hostName = "nix-cache";
      sshUser = "nixremote";
      sshKey = "/root/.ssh/nixremote";
      system = pkgs.stdenv.hostPlatform.system;
      maxJobs = 4;
      speedFactor = 2;
      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
    }
  ];

  nix.settings = {
    builders-use-substitutes = true;
    max-jobs = "auto";
  };
}