diff -Nru mysql-5.5-5.5.40/debian/changelog mysql-5.5-5.5.40/debian/changelog
--- mysql-5.5-5.5.40/debian/changelog	2014-11-24 16:54:16.000000000 +0000
+++ mysql-5.5-5.5.40/debian/changelog	2014-12-09 06:28:39.000000000 +0000
@@ -1,3 +1,10 @@
+mysql-5.5 (5.5.40-1+rpi1) jessie-staging; urgency=medium
+
+  * Disable parallel build due to build failure with no obvious case in build
+    log.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 09 Dec 2014 06:27:25 +0000
+
 mysql-5.5 (5.5.40-1) unstable; urgency=medium
 
   * SECURITY UPDATE: Update to 5.5.40 to fix security issues:
diff -Nru mysql-5.5-5.5.40/debian/rules mysql-5.5-5.5.40/debian/rules
--- mysql-5.5-5.5.40/debian/rules	2014-11-24 16:54:16.000000000 +0000
+++ mysql-5.5-5.5.40/debian/rules	2014-12-09 06:29:42.000000000 +0000
@@ -34,12 +34,12 @@
 # Parallel build support as adviced
 # at https://www.debian.org/doc/debian-policy/ch-source.html#s-debianrules-options
 ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
-    NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
+    #NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
     # Placeholder code to implement max cpu count value checking
     # if [$(NUMJOBS) > $(shell if [ -f /proc/cpuinfo ] ; then grep -c processor.* /proc/cpuinfo ; else echo 1 ; fi)]
     #  then NUMJOBS = 0
     # fi
-    MAKEFLAGS += -j $(NUMJOBS)
+    #MAKEFLAGS += -j $(NUMJOBS)
 endif
 
 # Add support for verbose builds