these 3 derivations will be built:
  /nix/store/xijbda8kl1g6shk5pndilkcrwg6ycam7-source.drv
  /nix/store/vl8xr2pm1g9705s7x872lsfs1shk3bp5-hindsight-1.0.0.drv
  /nix/store/qqafwh2rr6z2d9g5mgpa6v2hcy0lshbz-check-hindsight.drv