these 2 derivations will be built:
  /nix/store/vgnj0nljbm2sflg9bl81kg2v5qd030fs-nix-grpc-store-0.2.3.drv
  /nix/store/8h0fw8zmd03im02ms2n4fdb9g5l3nq31-nix-grpc-store-exit-stress.drv