these 2 derivations will be built:
  /nix/store/hgrzwf8k1245diin2wzbn6d125khi7xy-nix-grpc-store-0.2.2.drv
  /nix/store/2ch86rjsmzzvszwbv67nlpgsvxbkrb6k-nix-grpc-store-exit-stress.drv