this derivation will be built:
  /nix/store/ycibss4kkl2dkml45dbckbfp9nph9q95-updater-tests-check.drv
ycibss4kkl2dkml45dbckbfp9nph9q95-updater-tests-check.drv: mac02: not scheduled here: ycibss4kkl2dkml45dbckbfp9nph9q95-updater-tests-check.drv, asking the scheduler again