these 2 derivations will be built:
  /nix/store/8in6aqs1awy0mdpmv7kmyw5dkyhypc7w-nix-grpc-store-0.2.0.drv
  /nix/store/pwp4m777r4x44b4hh50kp6b80z3gw5wn-nix-grpc-store-exit-stress.drv