these 2 derivations will be built:
  /nix/store/ahbz8m6gdqvmc9710c1mrkl251x6163b-nix-grpc-store-0.1.0.drv
  /nix/store/r7i8661y4bwsf649ha30a0r4fbcrig6r-nix-grpc-store-dispatcher.drv