home-manager/common: Use nixpkgs flake for pkgs in Nix registry

home-manager/default.nix

@@ -1,4 +1,4 @@
-{ lib, hmFlakes, inputs, pkgs', config, ... }:
+{ lib, hmFlakes, pkgsFlakes, inputs, pkgs', config, ... }:
 let
   inherit (builtins) head tail mapAttrs attrValues;
   inherit (lib) flatten optional optionalAttrs mkOption mkDefault mkOptionType mkIf;
@@ -24,7 +24,7 @@ let
     # config merging behaviour (or lack thereof; similar to NixOS module), we explicitly pass empty config.
     # TODO: Check if this is fixed in future.
     pkgs = pkgs'.${config'.nixpkgs}.${config'.system} // { config = { }; };
-    extraSpecialArgs = { inherit inputs; };
+    extraSpecialArgs = { inherit inputs pkgsFlakes; pkgsFlake = pkgsFlakes.${config'.nixpkgs}; };
     "${modArg}" = (attrValues cfg.modules) ++ [
       {
         warnings = flatten [

home-manager/modules/common.nix

@@ -1,4 +1,4 @@
-{ lib, pkgs, pkgs', inputs, config, ... }@args:
+{ lib, pkgsFlake, pkgs, pkgs', inputs, config, ... }@args:
 let
   inherit (builtins) listToAttrs mapAttrs readFile;
   inherit (lib)
@@ -223,7 +223,7 @@ in
           pkgs = {
             to = {
               type = "path";
-              path = "${pkgs.path}";
+              path = "${pkgsFlake}";
             };
             exact = true;
           };

nixos/default.nix

@@ -31,7 +31,7 @@ let
       lib = pkgs.lib;
 
       # Put the inputs in specialArgs to avoid infinite recursion when modules try to do imports
-      specialArgs = { inherit inputs allAssignments; inherit (cfg) systems; };
+      specialArgs = { inherit inputs pkgsFlakes pkgsFlake allAssignments; inherit (cfg) systems; };
 
       # `baseModules` informs the manual which modules to document
       baseModules =