this derivation will be built:
  /nix/store/5d4hpjvbklhcbs99nrf4r6kxdlw4fd37-updater-tests-check.drv
5d4hpjvbklhcbs99nrf4r6kxdlw4fd37-updater-tests-check.drv: mac02: not scheduled here: 5d4hpjvbklhcbs99nrf4r6kxdlw4fd37-updater-tests-check.drv, asking the scheduler again