these 2 derivations will be built:
  /nix/store/3nnc4cm4bp75blhq5rpb24ni2mm5zagy-nix-grpc-store-0.2.2.drv
  /nix/store/q3z0gvzmwavciwd8yky8pn20hqb89kch-nix-grpc-store-exit-stress.drv