these 2 derivations will be built:
  /nix/store/r271aiz8m7p5idii998bb6sqmmdcf110-nix-grpc-store-0.2.3.drv
  /nix/store/zzx04lyzzrwsf0nv0y83v1j14xkk4i8y-nix-grpc-store-exit-stress.drv