diff -r 3362c64f4b6c -r a8bf927f6e37 config/debug/strace.in
--- a/config/debug/strace.in	Wed Oct 26 15:44:26 2011 -0700
+++ b/config/debug/strace.in	Tue Nov 06 17:02:06 2012 +0100
@@ -12,6 +12,7 @@
     bool
     prompt "4.6 (EXPERIMENTAL)"
     depends on EXPERIMENTAL
+    depends on CONFIGURE_has_xz
 
 config STRACE_V_4_5_20
     bool