--- C/Makefile.orig	2020-06-05 21:44:48.000000000 -0700
+++ C/Makefile	2020-06-05 21:45:10.000000000 -0700
@@ -38,7 +38,7 @@
 	$(CC) $(CFLAGS) $(XFS_OBJS) -o xsf2xsf $(MATH) $(LDLIB)
 
 
-install:
+install: xcrys xctclsh xsf2xsf
 	-cp xcrys   ../bin
 	-cp xctclsh ../bin
 	-cp xsf2xsf ../bin