anchor.diff:    NIX_LDFLAGS = [
       "-rpath ${xorg.libX11}/lib"
     ];
  +
  +  passthru = {
  +    srcVerification = fetchurl {
  +      failEarly = true;
  +      md5Urls = map (n: "${n}.md5") src.urls;
  +      inherit (src) urls outputHash outputHashAlgo;
  +    };
  +  };
   
     meta = with stdenv.lib; {
       description = "The GNU Image Manipulation Program";
  
positive.code:     poppler
      pythonPackages.python
      pythonPackages.pygtk
      xorg.fixesproto
      xorg.libICE
      xorg.libSM
  
negative.code: , libpng
  , librsvg
  , libtiff
  , libwebp
  , libwmf
  , libzip
  , openexr
  , pango
  , poppler
  , shared-mime-info
  , xorg
  , xz
  , zlib
  }:
  
  stdenv.mkDerivation rec {
    name = "gimp-2.9.6";
  
    src = fetchurl rec {
      url = "https://download.gimp.org/pub/gimp/v2.9/${name}.tar.bz2";
      multihash = "Qman1jmYyoHRXpJLTvRgeyGBrrVUpATSDUtTpafrXEPozS";
      hashOutput = false;
      sha256 = "b46f31d822a33ab416dcb15e33e10b5b98430814fa34f5ea4036230e845dfc9f";
    };
  
    nativeBuildInputs = [
  