{ user, ... }:
{
  nix.settings = {
    trusted-users = [ user ];
    substituters = [
      "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store"
      "https://mirrors.ustc.edu.cn/nix-channels/store"
      "https://cache.nixos.org"
      "https://nix-community.cachix.org"
      "https://hyprland.cachix.org"
      "https://niri.cachix.org"
      "https://nixpkgs-wayland.cachix.org"
    ];

    trusted-public-keys = [
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
      "niri.cachix.org-1:Wv0OmO7PsuocRKzfDoJ3mulSl7Z6oezYhGhR+3W2964="
      "nixpkgs-wayland.cachix.org-1:3lwxaILxMRkVhehr5StQprHdEo4IrE8sRho9R9HOLYA="
    ];
  };
}