Refractor to dendritic approach.

overlays/default.nix

@@ -1,22 +1,11 @@
-# This file defines overlays
 {inputs, ...}: {
-  addpkgs = final: _prev: (import ../pkgs {pkgs = final.pkgs;});
-
-  #Current overlay is for helm, to disable binary, so no conflict
-  modifications = final: prev: {
-    helm = prev.helm.overrideAttrs (oldAttrs: rec {
-      patches =
-        oldAttrs.patches
-        or []
-        ++ [
-          ./helm.patch
-        ];
+  config.flake.overlays.modifications = _final: prev: {
+    helm = prev.helm.overrideAttrs (oldAttrs: {
+      patches = oldAttrs.patches or [] ++ [./helm.patch];
     });
   };
 
-  # When applied, the unstable nixpkgs set (declared in the flake inputs) will
-  # be accessible through 'pkgs.unstable'
-  unstable-packages = final: _prev: {
+  config.flake.overlays.unstable-packages = final: _prev: {
     unstable = import inputs.nixpkgs-unstable {
       system = final.system;
       config.allowUnfree = true;