{ pkgs, ... }:
let
  thunderbirdWorkDesktopItem = pkgs.makeDesktopItem {
    name = "thunderbird-work";
    desktopName = "Thunderbird Work";
    icon = "thunderbird";
    exec = "thunderbird -P Work";
  };
  thunderbirdCloonarDesktopItem = pkgs.makeDesktopItem {
    name = "thunderbird-cloonar";
    desktopName = "Thunderbird Cloonar";
    icon = "thunderbird";
    exec = "thunderbird -P Cloonar";
  };
in
{

  nixpkgs.overlays = [
    (self: super:
      {
        thunderbird-bin-unwrapped = super.thunderbird-bin-unwrapped.overrideAttrs ( old: rec {
          version = "112.0b7";
          name = "thunderbird-bin";
          src = super.fetchurl {
               url = "https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/${version}/linux-x86_64/en-US/thunderbird-${version}.tar.bz2";
               sha256 = "30d23df34834096a79261439d5ea6d78d44921f0218893f100596ee6296cd806";
          };
        });
      }
    )
  ];
  environment.systemPackages = [ 
    # (import ../../pkgs/thunderbird.nix)
    pkgs.thunderbird-bin-unwrapped
    thunderbirdWorkDesktopItem
    thunderbirdCloonarDesktopItem
  ];
}