this derivation will be built:
  /nix/store/p87fzqvzwvv811xqgb6mycnlxhmw82i2-updater-tests-check.drv
p87fzqvzwvv811xqgb6mycnlxhmw82i2-updater-tests-check.drv: mac02: not scheduled here: p87fzqvzwvv811xqgb6mycnlxhmw82i2-updater-tests-check.drv, asking the scheduler again