{ pkgs, stable, ... }: let
  inherit (pkgs) fetchurl;
in {
  nixpkgs.overlays = [ (final: prev: {
    fahclient = prev.pkgs.callPackage (fetchurl {
      url = "https://raw.githubusercontent.com/NixOS/nixpkgs/e655eb33b2e83aebf39b30535e8990e45e27588b/pkgs/applications/science/misc/foldingathome/client.nix";
      hash = "sha256-LPFWAubPvmCuO25DE3MZ1JCk4MtHA7uhEKdpsAtkbsI=";
    }) {};
  })];
  services.foldingathome = {
    enable = true;
    daemonNiceLevel = 19;
    user = "Grimmauld";
    package = pkgs.fahclient;
  };
  environment.systemPackages = with pkgs; [ fahclient ];
}