diff --git a/init.el b/init.el
index 11a7ac4..dde31a3 100644
--- a/init.el
+++ b/init.el
@@ -381,34 +381,20 @@ Try `magit-clone-default-directory' if available, fall back to
                "~/Projects/")))
 (keymap-global-set "C-c w p" #'my/open-projects-directory)
 
-(defun my/open-nixos-project ()
-  "Open NixOS config project."
-  (interactive)
-  (require 'project)
-  (let ((nixos "/etc/nixos/"))
-    (if (file-directory-p nixos)
-        (project-switch-project nixos)
-      (warn (concat nixos " not found")))))
-(keymap-global-set "C-c p n" #'my/open-nixos-project)
-
-(defun my/open-emacs-project ()
-  "Open Emacs config project."
-  (interactive)
-  (require 'project)
-  (project-switch-project user-emacs-directory))
-(keymap-global-set "C-c p e" #'my/open-emacs-project)
-
 (setopt calendar-date-style 'iso
         calendar-mark-holidays-flag t
         calendar-mark-diary-entries-flag nil
         calendar-view-holidays-initially-flag nil
         calendar-view-diary-initially-flag nil)
 
-(setq appt-display-diary nil            ; Don't display diary on startup
-      appt-display-format 'echo
-      appt-display-interval 5
-      appt-message-warning-time 15)
-(appt-activate +1)
+(use-package appt
+  :custom
+  (appt-display-diary nil)
+  (appt-display-format 'echo)
+  (appt-display-interval 5)
+  (appt-message-warning-time 15)
+  :init
+  (appt-activate +1))
 
 (with-eval-after-load 'org
   (add-hook 'org-agenda-mode-hook #'org-agenda-to-appt))