these 2 derivations will be built:
  /nix/store/c3xm4zz0g86jm12rli7imfvzby2ihiax-nix-grpc-store-0.2.3.drv
  /nix/store/703j9h82afcxcf172v38yi7p5vy06474-nix-grpc-store-exit-stress.drv