these 2 derivations will be built:
  /nix/store/x68d1q7svg5gq2c0xw6bb87fr960v7gl-nix-grpc-store-0.2.3.drv
  /nix/store/7pm4wl38y4khljbdxpr0i88zywl4rd2j-nix-grpc-store-dispatcher.drv