If you are using both NixOS and Home Manager, is it supported to use the homeConfigurations like this in a nixosModule?

home-manager.users.${username} = inputs.self.homeConfigurations.${username}

I get the following error, when I try it:

 Module `:anon-5:anon-1' has an unsupported attribute `activation-script'. This is caused by introducing a top-level `config' or `options' attribute. Add configuration attributes immediately on the top level instead, or move all of them (namely: activation-script activationPackage extendModules newsDisplay newsEntries pkgs) into the explicit `config' attribute.