diff --git a/fflas-ffpack.changes b/fflas-ffpack.changes
index faba9aa..4696cb3 100644
--- a/fflas-ffpack.changes
+++ b/fflas-ffpack.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Nov 28 00:07:45 UTC 2016 - jengelh@inai.de
+
+- From time to time, configure fails to find lapack when built in
+  openSUSE:Factory. Emit config.log when that happens.
+
 -------------------------------------------------------------------
 Thu Oct 20 18:34:24 UTC 2016 - jengelh@inai.de
 
diff --git a/fflas-ffpack.spec b/fflas-ffpack.spec
index 2470958..ab52842 100644
--- a/fflas-ffpack.spec
+++ b/fflas-ffpack.spec
@@ -81,10 +81,12 @@ sed '/HTML_TIMESTAMP/s/YES/NO/' -i doc/Doxyfile
 if [ ! -e configure ]; then
 	autoreconf -fi
 fi
+trap "cat config.log; exit 1" ERR
 %configure \
 	--with-blas-cflags=" " \
 	--with-blas-libs="-lcblas -lblas" \
 	--enable-doc --with-docdir="%_docdir/%name"
+trap "" ERR
 make %{?_smp_mflags}
 
 %install