fix: Ensure all users are read from and that the config is shared between module levels

installer/artifacts.nix

@@ -3,6 +3,7 @@
   fleet,
   self,
   system,
+  users ? {},
 }:
 # This file defines the logic for generating various build artifacts (ISOs, Netboot, LXC, etc.)
 # It exports a set of packages that can be built using `nix build .#<artifact-name>`
@@ -29,6 +30,7 @@ let
           hostName
           targetSystemBuild
           diskoScript
+          users
           ;
         hostPlatform = system;
       };
@@ -46,6 +48,9 @@ let
       inherit system;
       specialArgs = { inherit inputs; };
       modules = fleet.modules.${hostName} ++ [
+        {
+          config.athenix.users = lib.mapAttrs (_: user: lib.mapAttrs (_: lib.mkDefault) user) users;
+        }
         {
           disko.enableConfig = lib.mkForce false;
           services.upower.enable = lib.mkForce false;
@@ -63,6 +68,9 @@ let
       specialArgs = { inherit inputs; };
       modules = fleet.modules.${hostName} ++ [
         "${nixpkgs}/nixos/modules/installer/netboot/netboot.nix"
+        {
+          config.athenix.users = lib.mapAttrs (_: user: lib.mapAttrs (_: lib.mkDefault) user) users;
+        }
         {
           disko.enableConfig = lib.mkForce false;
           services.upower.enable = lib.mkForce false;