{
  description = "NixOS configuration";

  inputs = {
    # nixpkgs
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    # home manager
    home-manager.url = "github:nix-community/home-manager/master";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    # hyprland
    hyprland.url = "github:hyprwm/Hyprland";
    hyprland.inputs.nixpkgs.follows = "nixpkgs";
    # hyprland plugins
    hyprland-plugins.url = "github:hyprwm/hyprland-plugins";
    hyprland-plugins.inputs.hyprland.follows = "hyprland";
    # hyprland hy3
    hy3.url = "github:outfoxxed/hy3";
    hy3.inputs.hyprland.follows = "hyprland";
    # sops
    sops-nix.url = "github:Mic92/sops-nix";
    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
    # astal
    astal.url = "github:aylur/astal";
    astal.inputs.nixpkgs.follows = "nixpkgs";
    # talc
    talc.url = "git+https://g.trimill.xyz/talc";
    talc.inputs.nixpkgs.follows = "nixpkgs";
    # unofficial-homestuck-collection
    unofficial-homestuck-collection.url = "git+https://g.freya.cat/freya/unofficial-homestuck-collection-nix";
    unofficial-homestuck-collection.inputs.nixpkgs.follows = "nixpkgs";
    # apple-fonts
    apple-fonts.url = "github:Lyndeno/apple-fonts.nix";
    apple-fonts.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = {nixpkgs, ...} @ inputs: let
    options = import ./options.nix;
    systems = ["x86_64-linux"];
    perSystem = func:
      builtins.listToAttrs (map (
          system: let
            pkgs = nixpkgs.legacyPackages.${system};
          in {
            name = system;
            value = func pkgs system;
          }
        )
        systems);
    buildSystem = file: system:
      inputs.nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = {inherit inputs;};
        modules = [
          options
          ./home
          ./modules
          ./system
          file
        ];
      };
  in rec {
    nixosConfigurations = {
      shinji = buildSystem ./hosts/shinji "x86_64-linux";
      kaworu = buildSystem ./hosts/kaworu "x86_64-linux";
      thinkpad = buildSystem ./hosts/thinkpad "x86_64-linux";
    };

    homeConfigurations = {
      shinji = nixosConfigurations.shinji.config.home-manager.users.${options.user}.home;
      kaworu = nixosConfigurations.kaworu.config.home-manager.users.${options.user}.home;
      thinkpad = nixosConfigurations.thinkpad.config.home-manager.users.${options.user}.home;
    };

    lib = import ./lib {
      inherit inputs options;
      inherit (nixpkgs) lib;
    };

    packages = perSystem (
      pkgs: system:
        import ./pkgs {
          inherit pkgs inputs system options;
          inherit (nixpkgs) lib;
        }
    );

    legacyPackages = packages;

    formatter = perSystem (
      pkgs: system:
        pkgs.alejandra
    );

    devShell = perSystem (
      pkgs: system:
        pkgs.mkShell {}
    );
  };
}