--- squashfs-tools/xz_wrapper.c.ark	2010-02-11 10:06:28.719254119 +0000
+++ squashfs-tools/xz_wrapper.c	2010-02-11 10:06:39.165920126 +0000
@@ -27,7 +27,7 @@
 #define LZMA_UNCOMP_SIZE 8
 #define LZMA_HEADER_SIZE (LZMA_PROPS_SIZE + LZMA_UNCOMP_SIZE)
 
-#define LZMA_OPTIONS 5
+#define LZMA_OPTIONS 9 | LZMA_PRESET_EXTREME
 #define MEMLIMIT (32 * 1024 * 1024)
 
 int lzma_compress(void **dummy, void *dest, void *src,  int size,