ref: remove overlay xref to pkgs

since packages are exposed through output.packages by their own,
a second export through overlays.pkgs would be smudging the public api
of this repository.

lib/utils.nix

@@ -85,11 +85,10 @@ in
   genPackages = { overlay, overlays, pkgs }:
     let
       packages = overlay pkgs pkgs;
-      overlays' = lib.filterAttrs (n: v: n != "pkgs") overlays;
       overlayPkgs =
         genAttrs
-          (attrNames overlays')
-          (name: (overlays'."${name}" pkgs pkgs)."${name}");
+          (attrNames overlays)
+          (name: (overlays."${name}" pkgs pkgs)."${name}");
     in
     recursiveUpdate packages overlayPkgs;
 

overlays/pkgs.nix

@@ -1 +0,0 @@
-../pkgs/default.nix