these 2 derivations will be built:
  /nix/store/z0ay4arwxzx1g7gxac2nz5q63vn1xkr6-nix-grpc-store-0.1.0.drv
  /nix/store/s5ick2n3l1gwk8664f5269w62vfphk5s-nix-grpc-store-exit-stress.drv