these 2 derivations will be built:
  /nix/store/yjiq1zmg7g7fx8h2l6vj0lag5vi6m2lx-nix-grpc-store-0.2.3.drv
  /nix/store/mzbzjya27k72fnnfscka8snb2mir9606-nix-grpc-store-exit-stress.drv