dotfiles/nixos/common/nixpkgs.nix

{
  inputs',
  lib,
  config,
  ...
}: let
  inherit
    (lib)
    flip
    mapAttrs
    filterAttrs
    const
    ;
in {
  nix.registry =
    flip mapAttrs (filterAttrs (n: const (n != "nixpkgs")) inputs')
    (
      n: flake: {inherit flake;}
    );
  nix.settings = {
    substituters = [
      "https://cache.nixos.org/"
      # "https://hydra.redalder.org/"
    ];
    trusted-public-keys = [
      "redalder-nix-cache-1:8t4zBJWgVtrfAOJ45iNHEqA/dDFV47Sr1sGa8ME9ru0="
    ];
    experimental-features =
      [
        "flakes"
        "nix-command"
        "ca-derivations"
        "recursive-nix"
        "dynamic-derivations"
      ]
      ++ (lib.optional (lib.versionAtLeast config.nix.package.version "2.24") "pipe-operators");
  };
}