these 2 derivations will be built:
  /nix/store/r3ypz8frhrksc0j423vzk2k4d3bkj18v-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/g682hg67rk3r2n31avr4iva259x2lrjp-nix-grpc-store-dispatcher.drv