these 2 derivations will be built:
  /nix/store/mnwx4dxcngrdph6sskfphvazkn7py2q8-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/z91fm8pfz2n0mi62ra6wwramjawr3shd-nix-grpc-store-dispatcher.drv