Make symlink to "ruby" only from the install-name

common.mk

@@ -867,12 +867,13 @@ exe/$(PROGRAM): ruby-runner.c ruby-runner.h exe/.time miniruby$(EXEEXT) {$(VPATH
 	$(Q) $(PURIFY) $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(OUTFLAG)$@ ruby-runner.$(OBJEXT) $(LIBS)
 	$(Q) $(POSTLINK)
 	$(Q) ./miniruby$(EXEEXT) \
-	    -e 'prog, dest = ARGV; dest += "/ruby"' \
+	    -e 'prog, dest, inst = ARGV; dest += "/ruby"' \
+	    -e 'exit unless prog==inst' \
 	    -e 'unless prog=="ruby"' \
 	    -e '  begin File.unlink(dest); rescue Errno::ENOENT; end' \
 	    -e '  File.symlink(prog, dest)' \
 	    -e 'end' \
-	$(@F) $(@D)
+	$(@F) $(@D) $(RUBY_INSTALL_NAME)$(EXEEXT)
 
 exe/.time:
 	$(Q) $(MAKEDIRS) $(@D)