these 2 derivations will be built:
  /nix/store/qicy52kvs8b4azgis4zcpf77ii49q9i4-nix-grpc-store-0.2.0.drv
  /nix/store/mzfzbil2vwcdw60l1m6l83gwaspa3w2q-nix-grpc-store-exit-stress.drv