anchor.diff:  fhsEnv = buildFHSUserEnv {
     name = "zotero-fhs-env";
     targetPkgs = pkgs: with pkgs; with xorg; [
  -    gtk3 dbus-glib
  +    gtk3 dbus-glib glib
       libXt nss
       libX11
     ];
  
positive.code: { stdenv, fetchurl, buildFHSUserEnv, makeDesktopItem, runCommand, bash, wrapGAppsHook, gsettings-desktop-schemas, gtk3, gnome3 }:
  
  let
  version = "5.0.35.1";
  meta = with stdenv.lib; {
    homepage = https://www.zotero.org;
    description = "Collect, organize, cite, and share your research sources";
  
negative.code: 
    src = fetchurl {
      url = "https://download.zotero.org/client/release/${version}/Zotero-${version}_linux-x86_64.tar.bz2";
      sha256 = "0753xk95shhxma4dvdxrj2q6y81z8lianxg7jnab9m17fb67jy2d";
    };
  
    buildInputs= [ wrapGAppsHook gsettings-desktop-schemas gtk3 gnome3.adwaita-icon-theme gnome3.dconf ];
  