these 2 derivations will be built:
  /nix/store/bvrw65jr8zzm0sa6r2jvbhywwissnwkj-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/ydhn1s00ncdn46cv0z7ry735xj0wxrfv-nix-grpc-store-exit-stress.drv