--- Makefile.in.orig	Fri Sep 20 03:24:43 2002
+++ Makefile.in	Fri Sep 20 03:25:29 2002
@@ -46,7 +46,9 @@
 	./mkinstalldirs $(bindir)
 	./mkinstalldirs $(prefix)
 	$(INSTALL) $(TARGET) $(bindir)/$(TARGET)
-	$(INSTALL) $(SOUNDSRV) $(prefix)/$(SOUNDSRV)
+	if [ "X$(SOUNDSRV)" != "X" ]; then \
+		$(INSTALL) $(SOUNDSRV) $(prefix)/$(SOUNDSRV); \
+	fi
 	./mkinstalldirs $(prefix)/sounds
 	./mkinstalldirs $(prefix)/levels
 	for i in levels/*.xgl; do $(INSTALL) $$i $(prefix)/$$i ; done