{
  self,
  nixpkgs-unstable,
  ...
} @ inputs: let
  inherit (nixpkgs-unstable.lib) forEach;

  mkTree = inputs.tree-input.tree;
  metaTree = mkTree ((import ../treeConfig.nix {}) // {inherit inputs;});
  tree = metaTree.impure;

  patchedInputs =
    inputs
    // {
      # set these to the correct versions from inputs
      nixpkgs = inputs.nixpkgs-unstable;
      home-manager = inputs.home-manager-unstable;
    };

  defaultSpecialArgs = {
    inherit self;
    tree = metaTree.impure;
    pureTree = metaTree.pure;
    inputs = patchedInputs;
  };

  defaultModules = [
    tree.profiles.base

    inputs.home-manager-unstable.nixosModules.home-manager

    inputs.nixos-wsl.nixosModules.default

    inputs.vaultui.nixosModules.default

    tree.modules.nixos.rcloneServe
    tree.modules.nixos.rcloneSync
    tree.modules.nixos.secrets
    tree.modules.nixos.postgreSQLRemoteBackup
    tree.modules.nixos.wslBuildTarballExt
    tree.modules.nixos.encryptedDrive
  ];

  nixosUnstableSystem = nixpkgs-unstable.lib.nixosSystem;

  nixosX86_64LiveWithExtraDepsForMachines = machines:
    nixosUnstableSystem {
      specialArgs =
        defaultSpecialArgs
        // {
          hostPath = ./nixos-live;
        };
      system = "x86_64-linux";
      modules =
        defaultModules
        ++ [
          ./nixos-live/nixos-live.nix
          ({...}: {
            system.extraDependencies =
              forEach machines (system:
                self.nixosConfigurations.${system}.config.system.build.toplevel);
          })
        ];
    };
in {
  lappy-t495 = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./lappy-t495;
      };
    system = "x86_64-linux";
    modules = defaultModules ++ [./lappy-t495/lappy-t495.nix ./lappy-t495/hardware.nix];
  };

  lappy-surface = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./lappy-surfacr;
      };
    system = "x86_64-linux";
    modules = defaultModules ++ [./lappy-surface/lappy-surface.nix ./lappy-surface/hardware.nix];
  };

  wsl = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./wsl;
      };
    system = "x86_64-linux";
    modules = defaultModules ++ [./wsl/wsl.nix];
  };

  hetzner-arm = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./hetzner-arm;
      };
    system = "aarch64-linux";
    modules = defaultModules ++ [./hetzner-arm/hetzner-arm.nix];
  };

  vault = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./vault;
      };
    system = "aarch64-linux";
    modules = defaultModules ++ [./vault/vault.nix];
  };

  # nix build .#nixosConfigurations.nixos-live-x86_64.config.system.build.isoImage
  nixos-live-x86_64 = nixosX86_64LiveWithExtraDepsForMachines ["lappy-t495"];

  # nix --no-sandbox build .#nixosConfigurations.raspberry.config.system.build.sdImage
  raspberry = nixosUnstableSystem {
    specialArgs =
      defaultSpecialArgs
      // {
        hostPath = ./vault;
      };
    system = "aarch64-linux";
    modules = defaultModules ++ [./raspberry/raspberry.nix];
  };
}