these 2 derivations will be built:
  /nix/store/8vrzc3ykkqng4difw4w7g73vqks81im7-nix-grpc-store-0.1.0.drv
  /nix/store/z3lcjz5wjind720rjx1fl0mk9brjlzns-nix-grpc-store-exit-stress.drv