--- ./lib/util/Makefile.in.orig
+++ ./lib/util/Makefile.in
@@ -148,10 +148,10 @@
 	./mksigname > $@
 
 mksiglist: $(srcdir)/mksiglist.c $(srcdir)/mksiglist.h $(incdir)/sudo_compat.h $(top_builddir)/config.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(DEFS) $(srcdir)/mksiglist.c -o $@
+	$${HOSTCC:-gcc} -I$(incdir) -I$(top_builddir) -I$(top_srcdir) $(DEFS) $(srcdir)/mksiglist.c -o $@
 
 mksigname: $(srcdir)/mksigname.c $(srcdir)/mksigname.h $(incdir)/sudo_compat.h $(top_builddir)/config.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(DEFS) $(srcdir)/mksigname.c -o $@
+	$${HOSTCC:-gcc} -I$(incdir) -I$(top_builddir) -I$(top_srcdir) $(DEFS) $(srcdir)/mksigname.c -o $@
 
 $(srcdir)/mksiglist.h: $(srcdir)/siglist.in
 	@if [ -n "$(DEVEL)" ]; then \