these 2 derivations will be built:
  /nix/store/80i01642594abcv7qf718x9dh0kfy5bk-nix-grpc-store-0.2.0.drv
  /nix/store/6hjl2mm8lp0gfn2p5izyg2nnld0x4lql-nix-grpc-store-exit-stress.drv