--- unix/Makefile
+++ unix/Makefile
@@ -24,6 +24,8 @@
 EXE =
 
 # probably can change this to 'install' if you have it
+INSTALL = cp
+# probably can change this to 'install' if you have it
 INSTALL_PROGRAM = cp
 # probably can change this to 'install -d' if you have it
 # XXX NextStep 3.3 and Openstep 4.x don't know about -p !