diff -r f4a0fc3d0aad -r d39abd309eb7 scripts/build/kernel/linux.sh
--- a/scripts/build/kernel/linux.sh	Wed Oct 17 21:21:44 2012 +0200
+++ b/scripts/build/kernel/linux.sh	Wed Oct 02 20:06:18 2013 +0200
@@ -154,6 +154,7 @@
             *.tgz)      tar_opt=--gzip;;
             *.tar.gz)   tar_opt=--gzip;;
             *.tar.bz2)  tar_opt=--bzip2;;
+            *.tar.xz)   tar_opt=--xz;;
         esac
         CT_DoExecLog ALL tar x ${tar_opt} -vf ${CT_KERNEL_LINUX_CUSTOM_PATH}
     else