{ prev, final, ... }:
{
#  firefox-unwrapped = (prev.firefox-unwrapped.overrideAttrs (old: {
#    patches = (old.patches or []) ++ [ ../patches/firefox_search_engines.patch ];
#  })).override {
#    stdenv = prev.ccacheStdenv;
#    overrideCC = stdenv: compiler: let
#      env = prev.ccacheStdenv.override { inherit stdenv; };
#    in prev.overrideCC env compiler;
#  };
  firefox = prev.firefox.overrideAttrs (old: {
    nativeBuildInputs = (old.nativeBuildInputs or []) ++ (with prev; [ zip unzip gnused ] );
    buildCommand = ''
      export buildRoot="$(pwd)"
    '' + old.buildCommand + ''
      cd $buildRoot
      unzip $out/lib/firefox/browser/omni.ja -d patched_omni || true
      rm $out/lib/firefox/browser/omni.ja
      cd patched_omni
      sed -i 's/"enterprise_only"\s*:\s*true,//' modules/policies/schema.sys.mjs
      zip -0DXqr $out/lib/firefox/browser/omni.ja * # potentially qr9XD
      cd $out
    '';
  });
}