these 2 derivations will be built:
  /nix/store/crbcwbf37pw1pgfyqba1sw0ppx83yn7s-nix-grpc-store-0.1.0.drv
  /nix/store/nz20wkaiq41zyvnqq4fpc7vl7djw0lgr-nix-grpc-store-exit-stress.drv