{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs, ... }:
    let lib = nixpkgs.lib; in
    {
      # Windows with NixOS WSL
      nixosConfigurations.Felia = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./wsl-configuration.nix
          {
            system.stateVersion = "22.05";
          }
        ];
        specialArgs = {
          # includeHardware = false;
          hostname = "Felia";
          _services.openssh = {
            permitRootLogin = "no";
            enable = true;
          };
        };
      };
      nixosConfigurations.lizzi = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./configuration.nix
          {
            system.stateVersion = "22.05";
          }
        ];
        specialArgs = {
          hostname = "lizzi";
          _networking = {
            interfaces.eth1.ipv4.addresses = [{
              address = "71.0.0.1";
              prefixLength = 24;
            }];
            firewall = {
              enable = true;
              allowedTCPPorts = [ 80 443 22 ];
            };
            useDHCP = false;
            # required so that we get IP address from linode
            interfaces.eth0.useDHCP = true;
          };
          _boot.loader.grub.enable = true;
          _boot.loader.grub.version = 2;
          _services.openssh = {
            permitRootLogin = "no";
            enable = true;
          };
          _services.gitea = {
            enable = true;
            stateDir = "/gitea";
            rootUrl = "https://git.pegasust.com";
            settings = {
              repository = {
                "ENABLE_PUSH_CREATE_USER" = true;
                "ENABLE_PUSH_CREATE_ORG" = true;
              };
            };
          };
          # Highly suspect that thanks to nginx, ipv6 is disabled?
          _services.nginx = {
            enable = true;
            clientMaxBodySize = "100m"; # Allow big file transfers over git :^)
            recommendedGzipSettings = true;
            recommendedOptimisation = true;
            recommendedProxySettings = true;
            recommendedTlsSettings = true;
            virtualHosts."git.pegasust.com" = {
              # Gitea hostname
              sslCertificate = "/var/lib/acme/git.pegasust.com/fullchain.pem";
              sslCertificateKey = "/var/lib/acme/git.pegasust.com/key.pem";
              forceSSL = true; # Runs on port 80 and 443
              locations."/".proxyPass = "http://localhost:3000/"; # Proxy to Gitea
            };
          };
        };
      };
      # Generic machine
      nixosConfigurations.pixi = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./configuration.nix
          {
            system.stateVersion = "22.05";
          }
        ];
        specialArgs = {
          hostname = "pixi";
          _networking = {
            # interfaces.eth1.ipv4.addresses = [{
            #   address = "71.0.0.1";
            #   prefixLength = 24;
            # }];
            firewall = {
              enable = false;
              allowedTCPPorts = [ 80 443 22 ];
            };
            useDHCP = false;
            # interfaces.eth0.useDHCP = true;
          };
          _boot.loader.grub.enable = true;
          _boot.loader.grub.version = 2;
          _services.openssh = {
            permitRootLogin = "no";
            enable = true;
          };
          _services.gitea = {
            enable = true;
            stateDir = "/gitea";
            rootUrl = "https://git.pegasust.com";
            settings = {
              repository = {
                "ENABLE_PUSH_CREATE_USER" = true;
                "ENABLE_PUSH_CREATE_ORG" = true;
              };
            };
          };
          _services.nginx = {
            enable = true;
            clientMaxBodySize = "100m"; # Allow big file transfers over git :^)
            recommendedGzipSettings = true;
            recommendedOptimisation = true;
            recommendedProxySettings = true;
            recommendedTlsSettings = true;
            virtualHosts."git.pegasust.com" = {
              # Gitea hostname
              sslCertificate = "/var/lib/acme/git.pegasust.com/fullchain.pem";
              sslCertificateKey = "/var/lib/acme/git.pegasust.com/key.pem";
              forceSSL = true; # Runs on port 80 and 443
              locations."/".proxyPass = "http://localhost:3000/"; # Proxy to Gitea
            };
          };
        };
      };
      nixosConfigurations.nyx = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./configuration.nix
          {
            system.stateVersion = "22.05";
          }
        ];
        specialArgs = {
          hostname = "nyx";
          _networking = {
            enableIPv6 = false;
            interfaces.eth1.ipv4.addresses = [{
              address = "71.0.0.2";
              prefixLength = 24;
            }];
            firewall.enable = true;
            useDHCP = false;
            interfaces.eth0.useDHCP = true;
          };
          _boot.loader.grub.enable = true;
          _boot.loader.grub.version = 2;
          _services.openssh = {
            permitRootLogin = "no";
            enable = true;
          };
        };
      };
      nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./configuration.nix
          {
            system.stateVersion = "22.05";
          }
        ];
        specialArgs = {
          hostname = "nixos";
        };
      };
      nixosConfigurations.bao = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
	      specialArgs.hostname = "bao";
        modules = [
          ./configuration.nix
          ({ config, pkgs, lib, ... }:
          let
            gpu_pkgs = [ pkgs.clinfo pkgs.lshw pkgs.glxinfo pkgs.pciutils ];
            gpu_conf = {
              # openCL
              hardware.opengl = {
                enable = true;
                extraPackages = let 
          	inherit (pkgs) rocm-opencl-icd rocm-opencl-runtime;
          	in 
          	[rocm-opencl-icd rocm-opencl-runtime];
                # Vulkan
                driSupport = true;
                driSupport32Bit = true;
                package = pkgs.mesa.drivers;
                package32 = pkgs.pkgsi686Linux.mesa.drivers;
              };
            };
            amd_rx470 = {
              # early amd gpu usage
              # boot.initrd.kernelModules = ["amdgpu"];
              services.xserver.enable = true;
              services.xserver.videoDrivers = ["amdgpu"];
            };
            nv_rtx3060 = {
              nixpkgs.config.allowUnfree = true;
              services.xserver.enable = true;
              services.xserver.videoDrivers = ["nvidia"];
              hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
            };
            systemPackages = [] ++ gpu_pkgs;
          in
          lib.recursiveUpdate gpu_conf (lib.recursiveUpdate nv_rtx3060 {
            # Use UEFI
            boot.loader.systemd-boot.enable = true;

            networking.hostName = "bao"; # Define your hostname.
            # Pick only one of the below networking options.
            # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
            networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.

            # Enable the X11 windowing system.
            services.xserver.enable = true;
            services.xserver.displayManager.sddm.enable = true;
            services.xserver.desktopManager.plasma5.enable = true;

            time.timeZone = "America/Phoenix";
            # Configure keymap in X11
            services.xserver.layout = "us";
            # services.xserver.xkbOptions = {
            #   "eurosign:e";
            #   "caps:escape" # map caps to escape.
            # };

            # Enable CUPS to print documents.
            # services.printing.enable = true;

            # Enable sound.
            sound.enable = true;
            hardware.pulseaudio.enable = true;

            # Enable touchpad support (enabled default in most desktopManager).
            # services.xserver.libinput.enable = true;

            # Define a user account. Don't forget to set a password with ‘passwd’.
            # users.users.alice = {
            #   isNormalUser = true;
            #   extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
            #   packages = with pkgs; [
            #     firefox
            #     thunderbird
            #   ];
            # };
            # Just an initial user to get this started lol
            users.users.user = {
              initialPassword = "pw123";
              extraGroups = [ "wheel" "networkmanager" ];
              isNormalUser = true;
            };

            # List packages installed in system profile. To search, run:
            # $ nix search wget
            environment.systemPackages = with pkgs; [
              neovim 
              wget
            ] ++ systemPackages;

            # Some programs need SUID wrappers, can be configured further or are
            # started in user sessions.
            # programs.mtr.enable = true;
            # programs.gnupg.agent = {
            #   enable = true;
            #   enableSSHSupport = true;
            # };

            # List services that you want to enable:

            # Enable the OpenSSH daemon.
            services.openssh.enable = true;

            # Open ports in the firewall.
            # networking.firewall.allowedTCPPorts = [ ... ];
            # networking.firewall.allowedUDPPorts = [ ... ];
            # Or disable the firewall altogether.
            # networking.firewall.enable = false;

            # Copy the NixOS configuration file and link it from the resulting system
            # (/run/current-system/configuration.nix). This is useful in case you
            # accidentally delete configuration.nix.
            # system.copySystemConfiguration = true;

            # This value determines the NixOS release from which the default
            # settings for stateful data, like file locations and database versions
            # on your system were taken. It‘s perfectly fine and recommended to leave
            # this value at the release version of the first install of this system.
            # Before changing this value read the documentation for this option
            # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
            system.stateVersion = "22.11"; # Did you read the comment?
          }))
        ];
      };
    };
}