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

    modules = with inputs; [];

    base = inputs.nixpkgs;
    homeManager = inputs.home-manager;

    groups = {
      servers = {};
    };

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

        base = inputs.nixpkgs-unstable;
        homeManager = inputs.home-manager-unstable;

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

      arcturus = {
        system = "x86_64-linux";

        groups = [
          groups.servers
        ];

        modules = with inputs; [
          microvm.nixosModules.host

          {
            microvm.vms = {
              equinox = {
                autostart = true;

                config = {config, ...}: {
                  imports = [./vms/equinox/default.nix];

                  networking.hostName = "equinox";

                  microvm = {
                    hypervisor = "qemu";
                    mem = 48 * 1024; # 48GB
                    vcpu = 16;

                    interfaces = [
                      {
                        type = "tap";
                        id = "vm-equinox";
                        mac = "0a:00:a0:70:01:02";
                      }
                    ];

                    writableStoreOverlay = "/nix/.rw-store";

                    volumes = [
                      {
                        image = "data.img";
                        mountPoint = "/home/foxora";
                        autoCreate = true;
                        size = 256 * 1024; # 256GB
                      }
                      {
                        image = "nix-store-overlay.img";
                        mountPoint = config.microvm.writableStoreOverlay;
                        size = 8 * 1024; # 8GB
                      }
                    ];

                    shares = [
                      {
                        # shares the host's nix store with the vm
                        # to prevent huge images
                        source = "/nix/store";
                        mountPoint = "/nix/.ro-store";
                        tag = "ro-store";
                        proto = "virtiofs";
                      }
                    ];
                  };

                  systemd.network.enable = true;
                  systemd.network.networks."20-lan" = {
                    matchConfig.Type = "ether";
                    networkConfig = {
                      Address = ["10.16.1.42/24"];
                      Gateway = "10.16.1.1";
                      DNS = ["10.16.1.1"];
                      IPv6AcceptRA = true;
                      DHCP = "yes";
                    };
                  };
                };
              };

              home-assistant = {
                autostart = true;

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

                  networking.hostName = "home-assistant";

                  microvm = {
                    hypervisor = "qemu";

                    # 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 = 4 * 1024; # 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";
                        autoCreate = true;
                        size = 32 * 1024; # 32GB
                      }
                    ];

                    shares = [
                      {
                        # shares the host's nix store with the vm
                        # to prevent huge images
                        source = "/nix/store";
                        mountPoint = "/nix/.ro-store";
                        tag = "ro-store";
                        proto = "virtiofs";
                      }
                    ];
                  };

                  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";
        };
      };

      lunata = {
        system = "x86_64-linux";

        groups = [
          groups.servers
        ];

        deploy.ssh = {
          remoteBuild = false;
          host = "176.58.114.228";
          port = 4070;
          user = "foxora";
        };
      };

      delphinus = {
        system = "x86_64-linux";

        groups = [
          groups.servers
        ];

        deploy.ssh = {
          remoteBuild = false;
          host = "172.233.47.244";
          port = 4070;
          user = "foxora";
        };
      };
    };
  };
})