1{
 2  den.aspects.core.nix = {
 3    nixos = {
 4      nix.settings = {
 5        experimental-features = [
 6          "nix-command"
 7          "flakes"
 8          "auto-allocate-uids"
 9          "cgroups"
10        ];
11        # Select UIDs for builds automatically, EXPERIMENTAL
12        auto-allocate-uids = true;
13        # Required by auto-allocate-uids
14        use-cgroups = true;
15        # Automatically hard link identical files in the Nix store
16        auto-optimise-store = true;
17        # Remote servers preferred substituters instead of local builders
18        builders-use-substitutes = true;
19        # Unlimited HTTP connections
20        http-connections = 0;
21        # Use `$XDG_STATE_HOME/nix/...` instead of `$HOME/.nix-...`
22        use-xdg-base-directories = true;
23
24        trusted-users = ["@wheel"];
25
26        flake-registry = "";
27      };
28      nix.channel.enable = false;
29
30      nixpkgs.flake.setFlakeRegistry = true;
31
32      system.copySystemConfiguration = false;
33    };
34  };
35}