--- a/Makefile	Sat Jan 02 22:41:10 2021 +0200
+++ b/Makefile	Sat Jan 02 22:42:24 2021 +0200
@@ -135,6 +135,10 @@
 install-all: install
 	install -m 0644 -t $(emacsdir) .emacs-pre .emacs-post
 
+.PHONY: install-packages
+install-packages:
+	$(EMACS) --batch -l "$(curdir)/.emacs-defs" -f my-lisp--install-external-packages
+
 .PHONY: install
 install: upgrade
 	rm -rf $(mylispdir)