this derivation will be built:
  /nix/store/j23ypx8hvagd7hz82r44n70asf692zhd-treefmt-check.drv
j23ypx8hvagd7hz82r44n70asf692zhd-treefmt-check.drv: mac02: not scheduled here: j23ypx8hvagd7hz82r44n70asf692zhd-treefmt-check.drv, asking the scheduler again