diff -Nru mysql-5.5-5.5.42/debian/changelog mysql-5.5-5.5.42/debian/changelog
--- mysql-5.5-5.5.42/debian/changelog	2015-02-09 14:13:08.000000000 +0000
+++ mysql-5.5-5.5.42/debian/changelog	2015-03-29 12:45:50.000000000 +0000
@@ -1,3 +1,10 @@
+mysql-5.5 (5.5.42-1+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>  Sun, 29 Mar 2015 12:45:19 +0000
+
 mysql-5.5 (5.5.42-1) unstable; urgency=medium
 
   [ James Page ]
diff -Nru mysql-5.5-5.5.42/debian/rules mysql-5.5-5.5.42/debian/rules
--- mysql-5.5-5.5.42/debian/rules	2015-02-09 10:33:49.000000000 +0000
+++ mysql-5.5-5.5.42/debian/rules	2015-03-29 12:45:50.000000000 +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