these 2 derivations will be built:
  /nix/store/ficjkvvaadh3q81x3s79232a0gc4anv7-nix-grpc-store-0.1.0-beta.3.drv
  /nix/store/znhwjlfrvinip9yh8dglz1qg7jjx3jk5-nix-grpc-store-exit-stress.drv