these 2 derivations will be built:
  /nix/store/4jhdykdgbdai095sa2lvnd5l05csvzsi-nix-grpc-store-0.2.3.drv
  /nix/store/ry3rrz9947m6sl1bxiknjmg754vc2mgx-nix-grpc-store-exit-stress.drv