diff -ur ess-18.10.2.orig/lisp/Makefile ess-18.10.2/lisp/Makefile
--- ess-18.10.2.orig/lisp/Makefile 2018-11-10 09:41:11.000000000 +0000
+++ ess-18.10.2/lisp/Makefile 2020-03-22 19:21:18.207954206 +0000
@@ -39,6 +39,7 @@
install: dist
-$(INSTALLDIR) $(LISPDIR)
+ $(INSTALL) $(ELS) $(LISPDIR)
$(INSTALL) $(ELC) $(LISPDIR)
if [ -f /etc/debian_version -a -n "$(SITELISP)" -a ! -f "$(SITELISP)/ess-site.el" ] ; \
then \