these 2 derivations will be built:
  /nix/store/12rvvs9bydpmsz1xwraigmacip7s0krv-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/i7y9vj9xfw49b68g2k9vd89f2grc5fxc-nix-grpc-store-exit-stress.drv