these 2 derivations will be built:
  /nix/store/icc2sn04ifmz7jrsvzx9ga7b13xsg0fz-nix-grpc-store-0.2.2.drv
  /nix/store/2japiy33108k8jqkj45vgv4lpwz38njg-nix-grpc-store-exit-stress.drv