these 2 derivations will be built:
  /nix/store/3z36gcj7q181g6lslalbzbkm3vw66vnf-nix-grpc-store-0.2.2.drv
  /nix/store/ravzi6wnh8ld1zff6rzq9zwzih9dpmic-nix-grpc-store-exit-stress.drv