these 2 derivations will be built:
  /nix/store/qymhckq635fyngfali02h9cl2gq03393-nix-grpc-store-0.2.3.drv
  /nix/store/dxsxs4ciy0kk9dsmyr65yqp4kjrd3781-nix-grpc-store-exit-stress.drv