Index: /trunk/src/VBox/Installer/linux/Makefile-footer.gmk
===================================================================
--- /trunk/src/VBox/Installer/linux/Makefile-footer.gmk	(revision 78132)
+++ /trunk/src/VBox/Installer/linux/Makefile-footer.gmk	(revision 78133)
@@ -92,7 +92,11 @@
 
 # Trigger parallel make job.
+ ifndef VBOX_NOJOBS
 JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
- ifeq ($(JOBS),0)
-  override JOBS := 1
+  ifeq ($(JOBS),0)
+   override JOBS := 1
+  endif
+ else
+JOBS :=
  endif