{ pkgs, ... }: {
  environment.systemPackages = with pkgs; [
    nixpkgs-review
    nix-output-monitor
    cachix
    home-manager
    lzma
    lzop
    zstd
    psmisc
  ];
  nix.settings = {
    substituters = [
      "https://nix-community.cachix.org"
      "https://deploy-rs.cachix.org"
      "https://binarycache.alanpearce.eu"
      "https://deploy-rs.cachix.org"
    ];

    trusted-public-keys = [
      "deploy-rs.cachix.org-1:xfNobmiwF/vzvK1gpfediPwpdIP0rpDV2rYqx40zdSI="
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      "deploy-rs.cachix.org-1:xfNobmiwF/vzvK1gpfediPwpdIP0rpDV2rYqx40zdSI="
      "binarycache.alanpearce.eu:ZwqO3XMuajPictjwih8OY2+RXnOKpjZEZFHJjGSxAI4="
    ];
  };
}