nixos-servers/deploy.nix

{
  self,
  deploy-rs,
  ...
}: let
  deployArch = "x86_64-linux";
  mkDeployNodes = nodeDef:
    builtins.mapAttrs
    (name: machine: nodeDef name machine)
    self.machines.${deployArch};
in {
  deploy = {
    sshUser = "root";
    user = "root";

    nodes = mkDeployNodes (name: machine: let
      nixosConfiguration = self.nixosConfigurations.${name};
      machineArch = nixosConfiguration.config.facter.report.system;
    in {
      hostname = nixosConfiguration.config.networking.fqdn;
      profiles.system = {
        remoteBuild = machineArch != deployArch;
        path = deploy-rs.lib.${machineArch}.activate.nixos nixosConfiguration;
      };
    });
  };
}