these 2 derivations will be built:
  /nix/store/1q0865dv2zp9il9b43w6hhmwzhrsif1k-nix-grpc-store-0.2.3.drv
  /nix/store/bqhksdnqyghvh0vla988cxgkixg51pyv-nix-grpc-store-exit-stress.drv