these 2 derivations will be built:
  /nix/store/npzsksracl4dlb81qwq2v9vjv5qjn19c-nix-grpc-store-0.2.3.drv
  /nix/store/gnmnzd8w9z0ra3f186b68k79dk3xrmja-nix-grpc-store-exit-stress.drv