{
  lib,
  pkgs,
  ...
}: {
  nixpkgs = {
    config = {
      allowUnfree = true;
      permittedInsecurePackages = lib.optional (pkgs.obsidian.version == "1.5.3") "electron-25.9.0";
    };
  };

  nh = {
    enable = true;
    clean = {
      enable = true;
      dates = "weekly";
      extraArgs = "--keep-since 3d --keep 5";
    };
  };

  nix = {
    settings = {
      extra-experimental-features = ["flakes" "nix-command"];
      warn-dirty = false;
      auto-optimise-store = true;
      builders-use-substitutes = true;
      keep-outputs = true;
      allowed-users = ["@wheel"];
      trusted-users = ["root" "@wheel"];
      substituters = [
        "https://hyprland.cachix.org"
        "https://cache.nixos.org"
        "https://nix-gaming.cachix.org"
        "https://anyrun.cachix.org"
        "https://viperml.cachix.org"
        "https://cache.flake.sh/kyasshu"
      ];
      trusted-public-keys = [
        "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
        "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
        "anyrun.cachix.org-1:pqBobmOjI7nKlsUMV25u9QHa9btJK65/C8vnO3p346s="
        "viperml.cachix.org-1:qZhKBMTfmcLL+OG6fj/hzsMEedgKvZVFRRAhq7j8Vh8="
        "kyasshu:g1heIgCgG7M4San6nRsz/omcVQ1GTc7+zKKm3L9Co7o="
      ];
    };
  };
}