these 2 derivations will be built:
  /nix/store/47q1qk0p9wjackihrqglclcx93m1ckq2-nix-grpc-store-0.2.3.drv
  /nix/store/a4lyd22nhhg1lkfvz95jfbwf59y2916c-nix-grpc-store-exit-stress.drv