these 2 derivations will be built:
  /nix/store/sh61jr81z6jhks393gylk91bfgayaxla-nix-grpc-store-0.2.3.drv
  /nix/store/88izr1m7yi7ax4nz66bi5bssp2r6ynl1-nix-grpc-store-dispatcher.drv