{cerulean, ...} @ inputs:
cerulean.mkNexus ./. (self: {
  nexus = {
    args = {inherit inputs;};

    modules = with inputs; [];

    base = inputs.nixpkgs;

    groups = {
      servers = {};
    };

    nodes = let
      inherit
        (self.nexus)
        groups
        ;
    in {
      nixarawrui = {
        system = "x86_64-linux";

        base = inputs.nixpkgs-unstable;

        modules = with inputs; [
          sddm-silent.nixosModules.default
        ];
      };

      arcturus = {
        system = "x86_64-linux";

        groups = [
          groups.servers
        ];

        modules = with inputs; [
          microvm.nixosModules.host

          {
            microvm.vms = {
              home-assistant = {
                autostart = true;

                config = {
                  imports = [./vms/home-assistant/default.nix];

                  networking.hostName = "home-assistant";

                  boot.kernelParams = ["console=ttyS0" "console=ttyS1" "8250.nr_uarts=2"];
                  systemd.services."serial-getty@ttyS1".enable = true;

                  microvm = {
                    hypervisor = "qemu";

                    # needed to get interface working
                    qemu.extraArgs = [
                      "-monitor" "unix:/var/lib/microvms/home-assistant/monitor.sock,server,nowait"
                      "-chardev" "socket,id=serial1,path=/var/lib/microvms/home-assistant/serial.sock,server=on,wait=off"
                      "-serial" "chardev:serial1"
                    ];

                    # memory cannot be 2GB so i doubled it and used 4GB:
                    # https://github.com/microvm-nix/microvm.nix/issues/171
                    # TODO: can be fixed by turning off acpi in qemu
                    mem = 4096; # 4GB
                    vcpu = 2;

                    interfaces = [
                      {
                        type = "tap";
                        id = "vm-hass";
                        mac = "0a:00:a0:70:01:01";
                      }
                    ];

                    volumes = [
                      {
                        image = "/var/lib/microvms/home-assistant/data.img";
                        mountPoint = "/var/lib/hass";
                        size = 16384; # 16GB
                      }
                    ];
                  };

                  systemd.network.enable = true;
                  systemd.network.networks."20-lan" = {
                    matchConfig.Type = "ether";
                    networkConfig = {
                      Address = ["10.16.1.127/24"];
                      Gateway = "10.16.1.1";
                      DNS = ["10.16.1.1"];
                      IPv6AcceptRA = true;
                      DHCP = "yes";
                    };
                  };
                };
              };
            };
          }
        ];

        deploy.ssh = {
          host = "10.16.1.163";
          port = 2222;
          user = "foxora";
        };
      };

      lyra = {
        system = "x86_64-linux";

        groups = [
          groups.servers
        ];

        deploy.ssh = {
          host = "10.16.1.58";
          port = 2222;
          user = "foxora";
        };
      };
    };
  };
})