these 2 derivations will be built:
  /nix/store/b654z13dpd7zd8f2ria0vvcsx747mmai-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/fgrgzhvm70xnjd1r0gry4claj57fpmdg-nix-grpc-store-exit-stress.drv