diff -r 3362c64f4b6c -r 00465900641c config/debug/strace.in
--- a/config/debug/strace.in	Wed Oct 26 15:44:26 2011 -0700
+++ b/config/debug/strace.in	Thu Mar 01 15:20:09 2012 -0800
@@ -12,6 +12,7 @@
     bool
     prompt "4.6 (EXPERIMENTAL)"
     depends on EXPERIMENTAL
+    depends on CONFIGURE_has_xz
 
 config STRACE_V_4_5_20
     bool