anchor.diff:    };
   
   
  -  buildInputs = [ autoconf automake boost zlib libpng libjpeg libtiff ];
  +  buildInputs = [ autoconf automake boost zlib libpng libjpeg libtiff x11 SDL ];
   
     # the installPhase wants to put files into $HOME. I let it put the files
     # to $TMPDIR, so they don't get into the $out
  
positive.code:                  sed -i -e 's/^povgroup.*/povgroup=nogroup/' Makefile.{am,in}
                 '';
  
    configureFlags = [ "COMPILED_BY='nix'" "--with-boost-thread=boost_thread" ];
  
    enableParallelBuilding = true;
    
  
negative.code: { stdenv, fetchFromGitHub, autoconf, automake, boost
  , zlib, libpng, libjpeg, libtiff, x11, SDL
  }:
  
  stdenv.mkDerivation rec {
  