these 2 derivations will be built:
  /nix/store/4ixd1a3d9az2fbxyy2diqn1gawg3aisr-nix-grpc-store-0.2.1.drv
  /nix/store/iwsp2c2jdw9p0b8bx4bva132dpyh788l-nix-grpc-store-exit-stress.drv