--- sudo-1.8.7/compat/Makefile.in.orig
+++ sudo-1.8.7/compat/Makefile.in
@@ -93,10 +93,10 @@
 	./mksigname > $@
 
 mksiglist: $(srcdir)/mksiglist.c $(srcdir)/mksiglist.h $(incdir)/missing.h $(top_builddir)/config.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(PIE_CFLAGS) $(SSP_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)/missing.h $(top_builddir)/config.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(PIE_CFLAGS) $(SSP_CFLAGS) $(DEFS) $(srcdir)/mksigname.c -o $@
+	$${HOSTCC:-gcc} -I$(incdir) -I$(top_builddir) -I$(top_srcdir) $(DEFS) $(srcdir)/mksigname.c -o $@
 
 fnm_test: fnm_test.o libreplace.la
 	$(LIBTOOL) --mode=link $(CC) -o $@ fnm_test.o libreplace.la $(PIE_LDFLAGS) $(SSP_LDFLAGS)