these 2 derivations will be built:
  /nix/store/sk8b8np21bxm9qjrh3f5jjykkfqs13i2-nix-grpc-store-0.2.0.drv
  /nix/store/aykdpn3fsz79nsxqrpynqs9b4nnxpgxs-nix-grpc-store-exit-stress.drv