these 2 derivations will be built:
  /nix/store/82fd4kl1h36njb9g18dlz1s4bxm2ip6a-nix-grpc-store-0.2.3.drv
  /nix/store/q5hhx26r4j30syv907gj9rd17av5vwba-nix-grpc-store-dispatcher.drv