these 2 derivations will be built:
  /nix/store/c9kfc91x2n2gkbrsr1mvm8way3062gy6-nix-grpc-store-0.2.3.drv
  /nix/store/krjf4rv3dfp3sic6jyxz8nig9cfmywb9-nix-grpc-store-exit-stress.drv