these 2 derivations will be built:
  /nix/store/71ipi2m2lrs146mnfnlrd4vg8w5pnsxb-nix-grpc-store-0.2.3.drv
  /nix/store/1lwxzn51nfnin346zra47878cbl8j88d-nix-grpc-store-exit-stress.drv