{
  lib,
  firefox-gx-src,
  stdenvNoCC,
}: let
  inherit (import ../../lib.nix {}) mkVersion;
in
  stdenvNoCC.mkDerivation {
    pname = "firefox-gx";
    version = mkVersion firefox-gx-src;

    src = firefox-gx-src;

    installPhase = ''
      # Personal changes
      sed -i 's/var(--fuchsia))/var(--purple))/' ./chrome/components/ogx_root-personal.css
      sed -i 's#../newtab/wallpaper-dark1.png#../newtab/wallpaper-dark2.png#' ./chrome/components/ogx_root-personal.css

      mkdir -p $out
      cp -r ./* $out
    '';

    meta = {
      description = "Firefox Theme CSS to Opera GX Lovers";
      homepage = "https://github.com/Godiesc/firefox-gx";
      license = lib.licenses.mspl;
    };
  }