these 2 derivations will be built:
  /nix/store/pw690984zl2ys1gh890why9lwcfv5n8s-nix-grpc-store-0.2.3.drv
  /nix/store/bajf7ws82fx0r8b4q8d1bjvqhq18vdqj-nix-grpc-store-exit-stress.drv