diff --git a/.gitmodules b/.gitmodules
index fee6232..9354e22 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
+[submodule "auto-compile"]
+	path = lib/auto-compile
+	url = git@github.com:tarsius/auto-compile.git
 [submodule "borg"]
 	path = lib/borg
 	url = git@gitlab.com:tarsius/borg.git
@@ -22,6 +25,9 @@
 	path = lib/magit
 	url = git@github.com:magit/magit.git
 	info-path = Documentation
+[submodule "packed"]
+	path = lib/packed
+	url = git@github.com:tarsius/packed.git
 [submodule "use-package"]
 	path = lib/use-package
 	url = git@github.com:jwiegley/use-package.git
diff --git a/init.el b/init.el
index ce33ea3..d00f0e1 100644
--- a/init.el
+++ b/init.el
@@ -26,6 +26,19 @@
   (require  'use-package)
   (setq use-package-verbose t))
 
+(use-package auto-compile
+  :demand t
+  :config
+  (auto-compile-on-load-mode)
+  (auto-compile-on-save-mode)
+  (setq auto-compile-display-buffer               nil)
+  (setq auto-compile-mode-line-counter            t)
+  (setq auto-compile-source-recreate-deletes-dest t)
+  (setq auto-compile-toggle-deletes-nonlib-dest   t)
+  (setq auto-compile-update-autoloads             t)
+  (add-hook 'auto-compile-inhibit-compile-hook
+            'auto-compile-inhibit-compile-detached-git-head))
+
 (use-package epkg
   :defer t
   :init (setq epkg-repository
diff --git a/lib/auto-compile b/lib/auto-compile
new file mode 160000
index 0000000..61c6bec
--- /dev/null
+++ b/lib/auto-compile
@@ -0,0 +1 @@
+Subproject commit 61c6bec0ab4e44fe68628a5ee0c8b3b7f50c001f
diff --git a/lib/packed b/lib/packed
new file mode 160000
index 0000000..4b27893
--- /dev/null
+++ b/lib/packed
@@ -0,0 +1 @@
+Subproject commit 4b278931c3694c467e5aaa0246956227806065a0