these 2 derivations will be built:
  /nix/store/1z9l4nqdklcrsz1d8gcafa69qdmly34d-nix-grpc-store-0.2.3.drv
  /nix/store/hxqgr2sqcnbr1hjwa27z4iy2zax1m2wa-nix-grpc-store-exit-stress.drv