nixos-configs/modules/nebula/shared.nix

rec {
  netName = "m-infra";

  # https://github.com/NixOS/nixpkgs/blob/nixos-24.05/nixos/modules/services/networking/nebula.nix
  interface = "nebula.${netName}";
  userGroup = "nebula-${netName}";
  service = "nebula@${netName}.service";
}