these 2 derivations will be built:
  /nix/store/66wddcspiwr43f15iai9gnc4cwh3bhlv-collie-1.16.2.drv
  /nix/store/4abhsgynfdbi2hsdl5lfbcjsscqsmkza-check-collie.drv
66wddcspiwr43f15iai9gnc4cwh3bhlv-collie-1.16.2.drv: mac02: not scheduled here: 66wddcspiwr43f15iai9gnc4cwh3bhlv-collie-1.16.2.drv, asking the scheduler again