Index: math/ess/Makefile
===================================================================
--- math/ess/Makefile
+++ math/ess/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	ess
 DISTVERSION=	18.10.2
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	math
 MASTER_SITES=	http://ess.r-project.org/downloads/ess/ \
 		http://stat.ethz.ch/ESS/downloads/ess/
Index: math/ess/files/patch-lisp_ess-r-package.el
===================================================================
--- /dev/null
+++ math/ess/files/patch-lisp_ess-r-package.el
@@ -0,0 +1,11 @@
+--- lisp/ess-r-package.el.orig	2021-01-22 20:38:19 UTC
++++ lisp/ess-r-package.el
+@@ -557,7 +557,7 @@ package mode. Use this function if state of the buffer
+   (error "As of ESS 16.04, `ess-developer' is deprecated. Use `ess-r-set-evaluation-env' instead"))
+ 
+ (defalias 'ess-toggle-developer 'ess-developer)
+-(define-obsolete-function-alias 'ess-r-devtools-check-package-buildwin 'ess-r-devtools-check-with-winbuilder)
++(define-obsolete-function-alias 'ess-r-devtools-check-package-buildwin 'ess-r-devtools-check-with-winbuilder "18.04")
+ (define-obsolete-function-alias 'ess-r-devtools-ask 'ess-r-devtools-execute-command "18.04")
+ 
+ (make-obsolete-variable 'ess-developer "Please use `ess-developer-select-package' and `ess-r-set-evaluation-env' instead." "16.04")