diff --git a/tox.ini b/tox.ini
index ba0e4b7..39d7212 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,5 +4,5 @@ envlist = py26,py27,py33,py34
 [testenv]
 deps=
 commands= ./waf distclean
-          ./waf configure {posargs} -v
+          ./waf configure {posargs} -v || cat build/config.log
           ./waf check -v