{
  # locked by the copied lockfile. inputs must match the main flake
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    stable.url = "nixpkgs/nixos-23.05";

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

    hyprland = {
      url = "github:hyprwm/Hyprland";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    hyprland-hy3 = {
      url = "github:outfoxxed/hy3";
      inputs.hyprland.follows = "hyprland";
    };

    hyprpaper = {
      url = "github:hyprwm/Hyprpaper";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # devenv
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = finputs @ { nixpkgs, ... }: let
    systems = [ "x86_64-linux" ];
  in builtins.foldl' (a: b: a // b) {} (builtins.map (system: let
      pkgs = import nixpkgs { inherit system; };
      inputs = finputs // { inherit system pkgs inputs; };
    in {
      devShells.${system} = {
        rust = import ./rust.nix inputs;
      };
    }) systems);
}