these 2 derivations will be built:
  /nix/store/mzl1wk47m8f7z9bsy107v64z2vp6d50s-nix-grpc-store-0.2.2.drv
  /nix/store/sh3xjigjff08rv3gc44ra3pyjbscync5-nix-grpc-store-exit-stress.drv