these 2 derivations will be built:
  /nix/store/yi626qavrphgssghsbvs9ijlss03q1ni-nix-grpc-store-0.2.3.drv
  /nix/store/gmdqpwyarz6a78mgz2d2ivkhnzsbzrax-nix-grpc-store-exit-stress.drv