these 2 derivations will be built:
  /nix/store/w1m3nyfv37sf2rws7gwvbz302iyn08ka-nix-grpc-store-0.2.3.drv
  /nix/store/waqj3cilarnkwffcyn52iiryp3k7m4jc-nix-grpc-store-exit-stress.drv