these 2 derivations will be built:
  /nix/store/md5k7x0qm1qydnfxs77b4lj489r0f5cm-nix-grpc-store-0.2.3.drv
  /nix/store/n68z3vn4a2z2hmyqb3zs5psw9018s33n-nix-grpc-store-exit-stress.drv