Is it possible to access home config, from nixos config?

[Straffern]

I need to set an environment variable depending on if a home manager module is enabled. Specifically I want something like this:

environment.sessionVariables.NIXOS_OZONE_WL = mkIf snowfallorg.users.${
        config.${namespace}.user.name
      }.home.config.desktop.hyprland.enable
      "1"; # Hint electron apps to use wayland

Where desktop.hyprland is a module living in:
modules/home/desktop/hyprland/default.nix

[bestlem]

Why do you need its as a global variable for all users rather than setting it in home-manager using home.sessionVariables ?

[Straffern]

@bestlem NIXOS_OZONE_WL has to be a global variable. Hyprland does not load user vars.

[Nikola-Milovic]

Can you reverse it? You set hyprland on the nixos system level (you can have just empty option) and then check for that in the home modules with osConfig? I had a few of these cases myself