these 2 derivations will be built:
  /nix/store/1pkrv8gzla9i5s6b79zw0qz2wmpfswgy-nix-grpc-store-0.1.0.drv
  /nix/store/qqczpgj1dxz69lz1vajxywk58scmvm75-nix-grpc-store-exit-stress.drv