anchor.diff:  , libGL
   , libGLU
   , libjpeg
  +, xorg
   , ncurses
   , libpng, libtool, mpfr, openssl, pango, poppler
   , readline, sqlite
  
positive.code:     license = with licenses; [ asl20 /* or */ mit ];
      maintainers = with maintainers; [ kkallio henrytill vrthra ];
      platforms = [ "x86_64-darwin" "x86_64-linux" "aarch64-linux" ];
      broken = stdenv.isDarwin; # No support yet for setting FFI lookup path
    };
  }
  
negative.code: 
    enableParallelBuilding = false;
  
    postFixup = lib.optionalString stdenv.isDarwin ''
      wrapProgram $out/bin/drracket --prefix DYLD_LIBRARY_PATH : ${xorg.libX11}/lib
    '';
  
    meta = with lib; {
      description = "A programmable programming language";
  