these 3 derivations will be built:
  /nix/store/nmw2bzwbk4a8yasdd983mkgcaaj7zkw6-source.drv
  /nix/store/wcjk00r6wz18wsr16npvbadjxbw5j1yp-collie-1.28.3.drv
  /nix/store/fah0nmyja4vsrxyvsr0rz6hmpslrpx4j-check-collie.drv