{ config, pkgs, ... }: {
  programs.ssh.extraConfig = ''
    StrictHostKeyChecking=accept-new
  '';

  nix.buildMachines = [
    {
      hostName = "bolty";
      sshUser = "nix-builder";
      sshKey = "/home/cyryl/.ssh/id_ed25519";
      systems = [ "x86_64-linux" "aarch64-linux" ];
      maxJobs = 2;
      speedFactor = 1;
      supportedFeatures = [ "kvm" ];
      mandatoryFeatures = [ ];
    }
    {
      hostName = "vpsfree1";
      sshUser = "nix-builder";
      sshKey = "/home/cyryl/.ssh/id_ed25519";
      systems = [ "x86_64-linux" "aarch64-linux" ];
      maxJobs = 2;
      speedFactor = 2;
      supportedFeatures = [ "kvm" ];
      mandatoryFeatures = [ ];
    }
  ];

  nix.extraOptions = ''
    builders-use-substitutes = true
  '';
  nix.distributedBuilds = true;

}