{
  description = "System config";

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

    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { nixpkgs, home-manager, ... }@inputs:
    let
      inherit (nixpkgs) lib;

      util = import ./lib {
        inherit system pkgs home-manager lib;
        overlays = (pkgs.overlays);
      };

      inherit (util) user;
      inherit (util) host;

      pkgs = import nixpkgs {
        inherit system;
        config.allowUnfree = true;
        overlays = [ ];
      };

      system = "x86_64-linux";

      nixosConfig = {
        boot = {
          type = "qemu-bios";
          qemu = true;
          grubInstallDevice = "/dev/vda";
        };
        core.enable = true;
      };

      vm2Config = {
        boot = {
          type = "uefi";
          qemu = true;
        };
        core.enable = true;
      };

      nixosUsers = [{
        name = "erwin";
        groups = [ "wheel" "networkmanager" "video" ];
        uid = 1000;
        shell = pkgs.fish;
        openssh.authorizedKeys.keys = [
          "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMNoTcRsAxDwpiIj6nhUXwzSQjtcgKCR0RDlzP57wi0W erwin@horusvr-ws2"
        ];
      }];

    in {
      homeManagerConfigurations = {
        erwin = user.mkHMUser {
          userConfig = {
            git.enable = true;
            ssh.enable = true;
            applications.enable = true;
            gpg.enable = true;
            fish.enable = true;
          };
          username = "erwin";
        };
      };

      nixosConfigurations = {
        vm1 = host.mkHost {
          name = "vm1";
          NICs = [ "enp1s0" ];
          kernelPackage = pkgs.linuxPackages;
          initrdMods = [
            "ahci"
            "xhci_pci"
            "virtio_pci"
            "sr_mod"
            "virtio_blk"
            "virtio_net"
            "virtio_mmio"
            "virtio_scsi"
            "9p"
            "9pnet_virtio"
          ];
          kernelMods =
            [ "kvm-amd" "virtio_balloon" "virtio_console" "virtio_rng" ];
          kernelParams = [ ];
          systemConfig = nixosConfig;

          users = nixosUsers;

          cpuCores = 6;
        };

        vm2 = host.mkHost {
          name = "vm2";
          NICs = [ "enp1s0" ];
          kernelPackage = pkgs.linuxPackages;
          initrdMods = [
            "ahci"
            "xhci_pci"
            "virtio_pci"
            "sr_mod"
            "virtio_blk"
            "virtio_net"
            "virtio_mmio"
            "virtio_scsi"
            "9p"
            "9pnet_virtio"
          ];
          kernelMods =
            [ "kvm-amd" "virtio_balloon" "virtio_console" "virtio_rng" ];
          kernelParams = [ ];
          systemConfig = vm2Config;

          users = nixosUsers;

          cpuCores = 4;
        };

        loki = host.mkHost {
          name = "loki";
          NICs = [ "enp4s0" ];
          kernelPackage = pkgs.linuxPackages;
          initrdMods = [ "nvme" "xhci_pci" "ahci" ];
          kernelMods = [ "kvm-amd" ];
        };
      };
    };
}