diff --git a/modules/misc/lib.nix b/modules/misc/lib.nix
new file mode 100644
index 00000000..e50794cc
--- /dev/null
+++ b/modules/misc/lib.nix
@@ -0,0 +1,15 @@
+{ lib, ... }:
+
+{
+  options = {
+    lib = lib.mkOption {
+      default = { };
+
+      type = lib.types.attrsOf lib.types.attrs;
+
+      description = ''
+        This option allows modules to define helper functions, constants, etc.
+      '';
+    };
+  };
+}
diff --git a/modules/module-list.nix b/modules/module-list.nix
index 30a83b9b..03c770e8 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -1,6 +1,7 @@
 [
   ./alias.nix
   ./documentation
+  ./misc/lib.nix
   ./security/pki
   ./security/sandbox
   ./system