these 2 derivations will be built:
  /nix/store/diyhrcxkxdbmil4kgprl79yl01j7jiam-nix-grpc-store-0.2.3.drv
  /nix/store/8cyh5zwfv7bpcxhvk3v91ixsp4x3hfhs-nix-grpc-store-exit-stress.drv