{
  description = "Koishi's NixOS flake.";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
    treefmt-nix.url = "github:numtide/treefmt-nix";
    treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
    impermanence.url = "github:nix-community/impermanence/master";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    plasma-manager.url = "github:pjones/plasma-manager";
    plasma-manager.inputs.nixpkgs.follows = "nixpkgs";
    plasma-manager.inputs.home-manager.follows = "home-manager";
    catppuccin.url = "github:catppuccin/nix";
    lanzaboote.url = "github:nix-community/lanzaboote/v0.4.2";
    lanzaboote.inputs.nixpkgs.follows = "nixpkgs";

    # steamdeck
    jovian.url = "github:Jovian-Experiments/Jovian-NixOS";
  };

  outputs =
    inputs@{
      self,
      flake-parts,
      treefmt-nix,
      ...
    }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [
        "x86_64-linux"
      ];

      perSystem.treefmt = {
        programs.nixfmt.enable = true;
      };
      imports = [
        ./spec
        treefmt-nix.flakeModule
      ];
    };
}