final: prev:
let
  patchedPkgs = import (builtins.fetchTarball {
    url =
      "https://github.com/nixos/nixpkgs/archive/ffdadd3ef9167657657d60daf3fe0f1b3176402d.tar.gz";
    sha256 = "1nrz4vzjsf3n8wlnxskgcgcvpwaymrlff690f5njm4nl0rv22hkh";
  }) {
    inherit (prev) system config;
    # inherit (prev) overlays;  # not sure
  };
  patchedPam = patchedPkgs.pam;
in {
  i3lock = prev.i3lock.override { pam = patchedPam; };
  #betterlockscreen = patchedPkgs.betterlockscreen.override {
  #  i3lock-color = prev.i3lock-color.override { pam = patchedPam; };
  #};
  i3lock-color = prev.i3lock-color.override { pam = patchedPam; };
  swaylock-effects = prev.swaylock-effects.override { pam = patchedPam; };
  swaylock = prev.swaylock.override { pam = patchedPam; };
  #swaylock-fancy = prev.swaylock-fancy.override { pam = patchedPam; };
  # apply the same patch to other packages
}