Provides a Clojure interactive development environment for Emacs, built on top of nREPL. See https://docs.cider.mx for more details. ; Installation: CIDER is available as a package in melpa.org and stable.melpa.org. First, make sure you've enabled one of the repositories in your Emacs config: (add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/")) or (add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t) Afterwards, installing CIDER is as easy as: M-x package-install cider