these 2 derivations will be built:
  /nix/store/g25mbl3547nmrxgifz5apnzy7b0hg9yi-nix-grpc-store-0.2.2.drv
  /nix/store/az78svhdi6smvk6ycllls1fgdxm9x8jb-nix-grpc-store-exit-stress.drv