these 2 derivations will be built:
  /nix/store/q50ngwzxpr53dlpi6a08zmjlg0zm76a3-nix-grpc-store-0.2.2.drv
  /nix/store/hfzibm2svja05vgbdvm4hwmdy5gmq7q8-nix-grpc-store-exit-stress.drv