{ prev, final, ... }: {
  perlPackages = (final.perl.override {
    overrides = p: {
      FinanceQuote = prev.perl.pkgs.FinanceQuote.overrideAttrs (oldAttrs: {
        patches = (oldAttrs.patches or []) ++ [
          ./tradegate.patch
        ];
      });
    };
  }).pkgs;
}