anchor.diff:      xorg.libSM
       xorg.libX11
       xorg.libXft
  +    xorg.libXfixes
       xorg.libXinerama
       xorg.libXpm
       xorg.libXrandr
       xorg.libXrender
  +    xorg.libxcb
       xorg.xproto
  +    zlib
     ];
   
     configureFlags = [
  
positive.code:     gnutls
      gpm
      gtk3
      libpng
      librsvg
      libtiff
  
negative.code: , gnutls
  , gpm
  , gtk3
  , libjpeg
  , libpng
  , librsvg
  , libtiff
  , libxml2
  , ncurses
  , xorg
  , zlib
  }:
  
  stdenv.mkDerivation rec {
  