these 3 derivations will be built:
  /nix/store/bdv5dndn6vdn7cvnx2yhrzz0p6qpg75r-source.drv
  /nix/store/ri2asdxry8cpp85p54x0r2jf5z5gs1zf-hindsight-1.0.0.drv
  /nix/store/kp30syvg781yfb5scykh0yp8aaq69b0v-check-hindsight.drv