these 2 derivations will be built:
  /nix/store/i0ga81rbwx9x5p1jmdd7a6ah7ynz2lqd-nix-grpc-store-0.1.0.drv
  /nix/store/b8342h7mqy981i4l01vwqd880f6g5kk2-nix-grpc-store-exit-stress.drv