these 3 derivations will be built:
  /nix/store/zhvs4hhafg0ajk2xlfg412b3y7il0mhi-source.drv
  /nix/store/v7vlw2y1cyiaf9x254g2fplapxfjd9c3-collie-1.27.1.drv
  /nix/store/fh4d5ml879ahfqvb60kmymf5fkkbqqk8-check-collie.drv