these 2 derivations will be built:
  /nix/store/b9wjrgaz3dglc3fj4gpm8rhs1h9jjk3m-nix-grpc-store-0.2.0.drv
  /nix/store/nw1xl42d43gc5hmhbrrnlgg8wviw9jjh-nix-grpc-store-exit-stress.drv