these 2 derivations will be built:
  /nix/store/76nl80zm9pd22k46y783qbqhlydp0grz-nix-grpc-store-0.2.2.drv
  /nix/store/0dx1l241a08bdy94pi7y2g5n3f8ic4dj-nix-grpc-store-exit-stress.drv