these 2 derivations will be built:
  /nix/store/b2iq5bndzmd1akp2r7kjybmd177ay67h-nix-grpc-store-0.2.3.drv
  /nix/store/s5s1gsqdcrb9qb46wajhabhjgs879q3a-nix-grpc-store-exit-stress.drv