anchor.diff:  { stdenv, fetchgit, fetchFromGitHub, fetchFromGitLab, cmake, pkgconfig, makeWrapper, python27, python37, retroarch
  -, alsaLib, fluidsynth, curl, hidapi, libGLU_combined, gettext, glib, gtk2, portaudio, SDL
  +, alsaLib, fluidsynth, curl, hidapi, libGLU, gettext, glib, gtk2, portaudio, SDL, libGL
   , ffmpeg, pcre, libevdev, libpng, libjpeg, udev, libvorbis
   , miniupnpc, sfml, xorg, zlib, nasm, libpcap, boost }:
   
  
positive.code:     configurePhase = "rm configure";
      buildPhase = "make -f Makefile.libretro";
    };
    
    picodrive = (mkLibRetroCore rec {
      core = "picodrive";
      src = fetchRetro {
  
negative.code:     name = "beetle-saturn-${der.version}";
      meta.platforms = [ "x86_64-linux" "aarch64-linux" ];
    };
  
    beetle-supergrafx = (mkLibRetroCore rec {
      core = "mednafen-supergrafx";
      src = fetchRetro {
  