{ config, lib, pkgs, inputs, ... }: {
  nix = {
    # Flake support and whatnot
    package = pkgs.nixUnstable;

    # Weekly clean up the store, I think
    gc = {
      automatic = true;
      dates = "weekly";
    };

    # Protect nix shell from garbage collection
    extraOptions = ''
      keep-outputs = true
      keep-derivations = true
    '';

    # TODO: look into what this does,
    # and why it was here in my old config
    optimise.automatic = true;

    # This will add each flake input as a registry
    # To make nix3 commands consistent with your flake
    registry = lib.mapAttrs (_: value: { flake = value; }) inputs;

    # This will additionally add your inputs to the system's legacy channels
    # Making legacy nix commands consistent as well, awesome!
    nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;

    settings = {
      # Enable flakes and new 'nix' command
      experimental-features = [ "nix-command" "flakes" "repl-flake" ];

      # Disable warning when rebuilding before commiting
      warn-dirty = false;

      # Deduplicate and optimize nix store
      auto-optimise-store = true;

      # TODO: what is a trusted user?
      trusted-users = [ "root" "@wheel" ];

      # {{{ Caching and whatnot
      substituters = [
        "https://cache.nixos.org" # Default nixos cache
        "https://nix-community.cachix.org" # I think I need this for neovim-nightly?
        "https://cm-idris2-pkgs.cachix.org" # Idris packages
        "https://danth.cachix.org" # stylix
      ];

      trusted-public-keys = [
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
        "cm-idris2-pkgs.cachix.org-1:YB2oJSEsD5oMJjAESxolC2GQtE6B5I6jkWhte2gtXjk="
        "danth.cachix.org-1:wpodfSL7suXRc/rJDZZUptMa1t4MJ795hemRN0q84vI="
      ];
      # }}}
    };
  };
}