these 2 derivations will be built:
  /nix/store/hfzbrk44wjnq1naf15nw58ln4d93nrhl-nix-grpc-store-0.2.1.drv
  /nix/store/h021mk3dgdif6x593b9lxa9izfqn07ns-nix-grpc-store-exit-stress.drv