these 2 derivations will be built:
  /nix/store/qyjw15njsrcppl09z385l5rica8sbl1c-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/9s43qn5wcnm37nkzj2nmvwynx55hnkd0-nix-grpc-store-exit-stress.drv