···
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<section xml:id="sec-emacs">
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<section xml:id="sec-emacs-config">
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<title>Configuring Emacs</title>
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The Emacs package comes with some extra helpers to make it easier to
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configure. <varname>emacsWithPackages</varname> allows you to manage
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packages from ELPA. This means that you will not have to install
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that packages from within Emacs. For instance, if you wanted to use
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<literal>company</literal>, <literal>counsel</literal>,
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<literal>flycheck</literal>, <literal>ivy</literal>,
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<literal>magit</literal>, <literal>projectile</literal>, and
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<literal>use-package</literal> you could use this as a
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<filename>~/.config/nixpkgs/config.nix</filename> override:
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packageOverrides = pkgs: with pkgs; {
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myEmacs = emacsWithPackages (epkgs: (with epkgs.melpaStablePackages; [
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You can install it like any other packages via <command>nix-env -iA
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myEmacs</command>. However, this will only install those packages.
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It will not <literal>configure</literal> them for us. To do this, we
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need to provide a configuration file. Luckily, it is possible to do
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this from within Nix! By modifying the above example, we can make
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Emacs load a custom config file. The key is to create a package that
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provide a <filename>default.el</filename> file in
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<filename>/share/emacs/site-start/</filename>. Emacs knows to load
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this file automatically when it starts.
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packageOverrides = pkgs: with pkgs; rec {
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myEmacsConfig = writeText "default.el" ''
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(package-initialize 'noactivate)
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(require 'use-package))
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:bind ("<C-tab>" . company-complete)
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:commands (company-mode global-company-mode)
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:commands (counsel-descbinds)
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:bind (([remap execute-extended-command] . counsel-M-x)
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("C-x C-f" . counsel-find-file)
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("C-c g" . counsel-git)
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("C-c j" . counsel-git-grep)
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("C-x l" . counsel-locate)
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("M-y" . counsel-yank-pop)))
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:config (global-flycheck-mode))
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:bind (("C-c C-r" . ivy-resume)
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("C-x C-b" . ivy-switch-buffer)
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:map ivy-minibuffer-map
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:if (executable-find "git")
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:bind (("C-x g" . magit-status)
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("C-x G" . magit-dispatch-popup))
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(setq magit-completing-read-function 'ivy-completing-read))
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(use-package projectile
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:commands projectile-mode
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:bind-keymap ("C-c p" . projectile-command-map)
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(projectile-global-mode))
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myEmacs = emacsWithPackages (epkgs: (with epkgs.melpaStablePackages; [
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(runCommand "default.el" {} ''
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mkdir -p $out/share/emacs/site-lisp
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cp ${myEmacsConfig} $out/share/emacs/site-lisp/default.el
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This provides a fairly full Emacs start file. It will load in
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addition to the user's presonal config. You can always disable it by
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passing <command>-q</command> to the Emacs command.
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