anchor.diff:      configureFlags = with stdenv.lib;
         [ "--with-gmp=${gmp.crossDrv}" "--with-mpfr=${mpfr.crossDrv}" "--with-system-readline"
           "--with-system-zlib" "--with-expat" "--with-libexpat-prefix=${expat.crossDrv}" "--without-python"
  -      ] ++ optional (target != null) "--target=${target.config}";
  +      ]
  +      ++ optional (target != null) "--target=${target.config}"
  +      ++ optional multitarget "--enable-targets=all";
     };
   
     postInstall =
  
positive.code: , python ? null
  , guile ? null
  , target ? null
  # Additional dependencies for GNU/Hurd.
  , mig ? null, hurd ? null
  
  
negative.code:       "--with-separate-debug-dir=/run/current-system/sw/lib/debug"
      ]
      ++ optional (target != null) "--target=${target.config}"
      ++ optional multitarget "--enable-targets=all"
      ++ optional (elem stdenv.system platforms.cygwin) "--without-python";
  
    crossAttrs = {
  