these 2 derivations will be built:
  /nix/store/11xf00wcn2z3az047zq90c9w9wnalb0z-nix-grpc-store-0.2.1.drv
  /nix/store/yspc7vpx8hsfkbqin04cq5qpizc3s76y-nix-grpc-store-exit-stress.drv