Index: /trunk/debian/rules
===================================================================
--- /trunk/debian/rules	(revision 91700)
+++ /trunk/debian/rules	(revision 91701)
@@ -158,15 +158,15 @@
 	    if [ -L $$d/build ]; then \
 	        make -C $(builddir)/bin/src/vboxdrv KERN_VER=$$(basename $$d) clean && \
-	        make -j4 -C $(builddir)/bin/src/vboxdrv KBUILD_VERBOSE= KERN_VER=$$(basename $$d) all; \
+	        make -C $(builddir)/bin/src/vboxdrv KBUILD_VERBOSE= KERN_VER=$$(basename $$d) all; \
 	        make -C $(builddir)/bin/src/vboxnetflt KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetflt || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxnetflt KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetflt/Module.symvers all; \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetflt || true) && \
+	        make -C $(builddir)/bin/src/vboxnetflt KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetflt/Module.symvers all; \
 	        make -C $(builddir)/bin/src/vboxnetadp KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetadp || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxnetadp KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetadp/Module.symvers all; \
-	        make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxpci || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxpci KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxpci/Module.symvers all; \
-	        make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean; true; \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetadp || true) && \
+	        make -C $(builddir)/bin/src/vboxnetadp KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetadp/Module.symvers all; \
+	        [ -d $(builddir)/bin/src/vboxpci ] && make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean && \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxpci || true) && \
+	        make -C $(builddir)/bin/src/vboxpci KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxpci/Module.symvers all; \
+	        true; \
 	    fi; \
 	done
Index: /trunk/src/VBox/Installer/linux/debian/rules
===================================================================
--- /trunk/src/VBox/Installer/linux/debian/rules	(revision 91700)
+++ /trunk/src/VBox/Installer/linux/debian/rules	(revision 91701)
@@ -182,15 +182,15 @@
 	    if [ -L $$d/build ]; then \
 	        make -C $(builddir)/bin/src/vboxdrv KERN_VER=$$(basename $$d) clean && \
-	        make -j4 -C $(builddir)/bin/src/vboxdrv KBUILD_VERBOSE= KERN_VER=$$(basename $$d) all; \
+	        make -C $(builddir)/bin/src/vboxdrv KBUILD_VERBOSE= KERN_VER=$$(basename $$d) all; \
 	        make -C $(builddir)/bin/src/vboxnetflt KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetflt || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxnetflt KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetflt/Module.symvers all; \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetflt || true) && \
+	        make -C $(builddir)/bin/src/vboxnetflt KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetflt/Module.symvers all; \
 	        make -C $(builddir)/bin/src/vboxnetadp KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetadp || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxnetadp KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetadp/Module.symvers all; \
-	        make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean && \
-		(cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxpci || true) && \
-	        make -j4 -C $(builddir)/bin/src/vboxpci KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxpci/Module.symvers all; \
-	        make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean; true; \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxnetadp || true) && \
+	        make -C $(builddir)/bin/src/vboxnetadp KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxnetadp/Module.symvers all; \
+	        [ -d $(builddir)/bin/src/vboxpci ] && make -C $(builddir)/bin/src/vboxpci KERN_VER=$$(basename $$d) clean && \
+	        (cp $(builddir)/bin/src/vboxdrv/Module.symvers $(builddir)/bin/src/vboxpci || true) && \
+	        make -C $(builddir)/bin/src/vboxpci KBUILD_VERBOSE= KERN_VER=$$(basename $$d) KBUILD_EXTRA_SYMBOLS=$(builddir)/bin/src/vboxpci/Module.symvers all; \
+	        true; \
 	    fi; \
 	done