these 2 derivations will be built:
  /nix/store/ym0ax7ll7dp1acb5a6w47yprgjv73rcv-nix-grpc-store-0.2.3.drv
  /nix/store/ddcr62amxlxdvjx7l22ymx0acbxwjh1f-nix-grpc-store-dispatcher.drv