Minor edits.

.emacs.d/modules/lang/nix/config.el

@@ -1,5 +1,12 @@
 ;;; lang/nix/config.el -*- lexical-binding: t; -*-
 
+(after! tramp
+  (add-to-list 'tramp-remote-path "/run/current-system/sw/bin"))
+
+
+;;
+;;; Plugins
+
 (use-package! nix-mode
   :interpreter ("\\(?:cached-\\)?nix-shell" . +nix-shell-init-mode)
   :mode "\\.nix\\'"
@@ -8,6 +15,11 @@
   (set-company-backend! 'nix-mode 'company-nixos-options)
   (set-lookup-handlers! 'nix-mode
     :documentation '(+nix/lookup-option :async t))
+  (set-popup-rule! "^\\*nixos-options-doc\\*$" :ttl 0 :quit t)
+
+  ;; Fix #3927: disable idle completion because `company-nixos-options' is
+  ;; dreadfully slow. It can still be invoked manually..
+  (setq-hook! 'nix-mode-hook company-idle-delay nil)
 
   (map! :localleader
         :map nix-mode-map