these 2 derivations will be built:
  /nix/store/7m63zi43mzlc0j24ymlnfzkhpvjhrlxk-nix-grpc-store-0.2.3.drv
  /nix/store/gbjkskxpavfa9pfriz390pk005vqb9lv-nix-grpc-store-dispatcher.drv