diff -urN scotch_6.0.8.orig/src/libscotch/Makefile scotch_6.0.8/src/libscotch/Makefile
--- scotch_6.0.8.orig/src/libscotch/Makefile	2019-05-18 16:53:25.000000000 -0700
+++ scotch_6.0.8/src/libscotch/Makefile	2019-10-09 04:21:01.832072100 -0700
@@ -3062,14 +3062,14 @@
 					mapping.h				\
 					order.h					\
 					parser.h
-			 		$(CCD) $(CCDFLAGS) -DSCOTCH_VERSION_NUM=$(VERSION) -DSCOTCH_RELEASE_NUM=$(RELEASE) -DSCOTCH_PATCHLEVEL_NUM=$(PATCHLEVEL) $(<) -o $(@) $(LDFLAGS)
+			 		$(CCD) $(CCDFLAGS) -DSCOTCH_VERSION_NUM=$(VERSION) -DSCOTCH_RELEASE_NUM=$(RELEASE) -DSCOTCH_PATCHLEVEL_NUM=$(PATCHLEVEL) $(<) -o $(@) $(LDFLAGS) -lgnurx
 
 ptdummysizes$(EXE)		:	dummysizes.c				\
 					module.h				\
 					common.h				\
 					dgraph.h				\
 					dorder.h
-			 		$(CCD) $(CCDFLAGS) -DSCOTCH_VERSION_NUM=$(VERSION) -DSCOTCH_RELEASE_NUM=$(RELEASE) -DSCOTCH_PATCHLEVEL_NUM=$(PATCHLEVEL) $(<) -o $(@) $(LDFLAGS)
+			 		$(CCD) $(CCDFLAGS) -DSCOTCH_VERSION_NUM=$(VERSION) -DSCOTCH_RELEASE_NUM=$(RELEASE) -DSCOTCH_PATCHLEVEL_NUM=$(PATCHLEVEL) $(<) -o $(@) $(LDFLAGS) -lgnurx
 
 scotch.h			:	dummysizes$(EXE)			\
 					library.h
