these 2 derivations will be built:
  /nix/store/mp6nnhycxpp0dhcs44a42cgcb7mhzkbx-nix-grpc-store-0.2.3.drv
  /nix/store/frxl3kbpqadz39z4ww1pianaw4zb0pja-nix-grpc-store-exit-stress.drv