this derivation will be built:
  /nix/store/k6378xa53dhagyi8vipqbmlpm5ixzv4f-updater-tests-check.drv
k6378xa53dhagyi8vipqbmlpm5ixzv4f-updater-tests-check.drv: mac02: not scheduled here: k6378xa53dhagyi8vipqbmlpm5ixzv4f-updater-tests-check.drv, asking the scheduler again