   :init
   (progn
     (use-package helm-ag
-      :ensure helm-ag)
+      :ensure t)
     (use-package helm-buffers)
     (use-package helm-files)
     (use-package helm-grep)
     (use-package helm-swoop)
     (use-package helm-config))
-  :ensure helm)
+  :ensure t)
 
 (defun ar/projectile-helm-ag ()
   (interactive)


;; M-. elisp navigation.
(use-package elisp-slime-nav
  :ensure elisp-slime-nav)

(defun ar/add-functions-to-mode-hooks (hook-functions hooks)
  "Adds HOOK-FUNCTIONS to mode HOOKS."


;; displays hex strings representing colors
(use-package rainbow-mode
  :ensure t)

;; Activate smerge on conflicts.
(defun sm-try-smerge ()
