these 2 derivations will be built:
  /nix/store/1758lgxn85xpi7mch66lzqdjxdsq49wz-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/jn547p32lp3vw2b49m53lz22q1jj1qiq-nix-grpc-store-exit-stress.drv