--- old/make/InitSupport.gmk	2016-04-20 17:15:57.638175384 +0200
+++ new/make/InitSupport.gmk	2016-04-20 17:15:57.558172039 +0200
@@ -331,7 +331,7 @@
   BUILD_LOG := $(OUTPUT_ROOT)/build.log
   BUILD_TRACE_LOG := $(OUTPUT_ROOT)/build-trace-time.log
 
-  BUILD_LOG_PIPE := > >($(TEE) -a $(BUILD_LOG)) 2> >($(TEE) -a $(BUILD_LOG) >&2)
+  BUILD_LOG_PIPE := > >($(TEE) -a $(BUILD_LOG)) 2> >($(TEE) -a $(BUILD_LOG) >&2) && wait
 
   # Sanity check the spec file, so it matches this source code
   define CheckSpecSanity
--- old/make/common/MakeBase.gmk	2016-04-20 17:15:58.018191272 +0200
+++ new/make/common/MakeBase.gmk	2016-04-20 17:15:57.934187760 +0200
@@ -706,10 +706,10 @@
 ExecuteWithLog = \
   $(call LogCmdlines, Exececuting: [$(strip $2)]) \
   $(call WriteFile, $2, $(strip $1).cmdline) \
-  ( $(strip $2) > >($(TEE) $(strip $1).log) 2> >($(TEE) $(strip $1).log >&2) || \
+  ( ( $(strip $2) > >($(TEE) $(strip $1).log) 2> >($(TEE) $(strip $1).log >&2) || \
       ( exitcode=$(DOLLAR)? && \
       $(CP) $(strip $1).log $(MAKESUPPORT_OUTPUTDIR)/failure-logs/$(subst /,_,$(patsubst $(BUILD_OUTPUT)/%,%,$(strip $1))).log && \
-      exit $(DOLLAR)exitcode ) )
+      exit $(DOLLAR)exitcode ) ) && wait )
 
 ################################################################################
 # Find lib dir for module