these 2 derivations will be built:
  /nix/store/kh9cp4kcxd31dka1ih4miwvmqi9sbdmq-nix-grpc-store-0.2.1.drv
  /nix/store/i3hr9h8cjg6kvny6kzaq8m6vgfpl6s50-nix-grpc-store-exit-stress.drv