--- rpl/Makefile.am	2011/11/30 09:27:46	1.40
+++ rpl/Makefile.am	2011/11/30 15:52:44	1.41
@@ -216,7 +216,7 @@ $(top_builddir)/rplcas/lib/librplcas.a:
 
 $(top_builddir)/tools/@OPENMOTIF@/lib/Xm/.libs/libXm.a: \
 		$(top_builddir)/tools/@LIBXPM@/src/.libs/libXpm.a
-	$(MAKE) -C $(top_builddir)/tools/@OPENMOTIF@ $(AM_MAKEFLAGS)
+	$(MAKE) -C $(top_builddir)/tools/@OPENMOTIF@ -j1
 
 $(top_builddir)/tools/@LIBXPM@/src/.libs/libXpm.a:
 	$(MAKE) -C $(top_builddir)/tools/@LIBXPM@ $(AM_MAKEFLAGS)