+Update: the above is not necessary, since =straight.el= automatically
+does that (and more). See =straight-package-neutering-mode=.
+
+*** =straight.el=
+
+#+begin_quote
+Next-generation, purely functional package manager for the Emacs
+hacker.
+#+end_quote
+
+=straight.el= allows me to have a fully reproducible Emacs setup.
+
+#+begin_src emacs-lisp
+(setq straight-repository-branch "develop")
+
+(defvar bootstrap-version)
+(let ((bootstrap-file
+ (expand-file-name "straight/repos/straight.el/bootstrap.el" user-emacs-directory))
+ (bootstrap-version 5))
+ (unless (file-exists-p bootstrap-file)
+ (with-current-buffer
+ (url-retrieve-synchronously
+ "https://raw.githubusercontent.com/raxod502/straight.el/develop/install.el"
+ 'silent 'inhibit-cookies)
+ (goto-char (point-max))
+ (eval-print-last-sexp)))
+ (load bootstrap-file nil 'nomessage))
+
+(setq straight-use-package-by-default t)
+#+end_src
+
+Since we enable =straight.el='s =straight-use-package-by-default=
+integration, we will define a =use-feature= for plain ole
+=use-package= without any of the =straight.el= stuff.
+
+#+begin_src emacs-lisp
+(defmacro use-feature (name &rest args)
+ "Like `use-package', but with `straight-use-package-by-default' disabled."
+ (declare (indent defun))
+ `(use-package ,name
+ :straight nil
+,@args))
+#+end_src
+
+*** COMMENT Borg