{ ... }: { services.flameshot = { enable = true; settings = { General = { disabledTrayIcon = true; showStartupLaunchMessage = false; }; }; }; test.stubs.flameshot = { }; nmt.script = '' assertFileContent \ home-files/.config/flameshot/flameshot.ini \ ${ builtins.toFile "expected.ini" '' [General] disabledTrayIcon=true showStartupLaunchMessage=false '' } ''; }