{ config, pkgs, ... }: { config = { services.gammastep = { enable = true; provider = "manual"; latitude = "0.0"; longitude = "0.0"; }; nixpkgs.overlays = [ (self: super: { gammastep = pkgs.writeScriptBin "dummy-gammastep" "" // { outPath = "@gammastep@"; }; }) ]; nmt.script = '' assertFileContent \ home-files/.config/systemd/user/gammastep.service \ ${./gammastep-basic-configuration-expected.service} ''; }; }