these 2 derivations will be built:
  /nix/store/8rkzfi91x5frhz3907k1wfq91w4hdyk3-nix-grpc-store-0.2.3.drv
  /nix/store/5l7f1mh1w5iwnn7liqc6g7bzc2ia55wf-nix-grpc-store-dispatcher.drv