anchor.diff:      XMLSAX
     ]);
   
  +  prePatch = ''
  +    sed -i 's|"/usr/include/asm-generic/ioctls.h"|<asm-generic/ioctls.h>|g' xs/src/libslic3r/GCodeSender.cpp
  +  '';
  +
     postInstall = ''
       echo 'postInstall'
       wrapProgram "$out/bin/slic3r-prusa3d" \
  
positive.code: in
  stdenv.mkDerivation rec {
    name = "slic3r-prusa-edition-${version}";
    version = "1.38.7";
  
    enableParallelBuilding = true;
  
  
negative.code:   src = fetchFromGitHub {
      owner = "prusa3d";
      repo = "Slic3r";
      sha256 = "0frkjgzmiy788ijkcqz3baxcrncqmk9s2vcd99hb8p2q13cg51ff";
      rev = "version_${version}";
    };
  
  