Improved? battery life + pkgs functions

overlays/functions/default.nix

@@ -0,0 +1,29 @@
+{
+  channels,
+  namespace,
+  inputs,
+  lib,
+  ...
+}: 
+  final: prev: let
+  inherit (lib.snowfall.fs) get-snowfall-file get-directories get-default-nix-files-recursive;
+  inherit (lib.attrsets) nameValuePair listToAttrs;
+
+  srcDir = get-snowfall-file "functions";
+  dirs = get-directories srcDir;
+  nixFiles =
+  lib.concatMap get-default-nix-files-recursive dirs;
+  functions = listToAttrs (map
+  (file:
+    let
+      dirName =
+        builtins.unsafeDiscardStringContext
+          (builtins.baseNameOf
+            (builtins.unsafeDiscardStringContext
+              (builtins.toString
+                (builtins.dirOf file))));
+    in
+    nameValuePair dirName (final.callPackage file {}))
+  nixFiles);
+in
+functions // {${namespace} = functions;}