{ config, lib, pkgs, ... }: with lib; { config = { home.username = mkForce "root"; systemd.user.services."test-service@" = { Unit = { Description = "A basic test service"; }; Service = { Environment = [ "VAR1=1" "VAR2=2" ]; ExecStart = ''/some/exec/start/command --with-arguments "%i"''; }; }; nmt.script = '' serviceFile=home-files/.config/systemd/user/test-service@.service assertPathNotExists $serviceFile ''; }; }