this derivation will be built:
  /nix/store/34xx3zxdq1sax054czzyjr21wvry7c46-nix-grpc-store-0.1.0.drv
building '/nix/store/34xx3zxdq1sax054czzyjr21wvry7c46-nix-grpc-store-0.1.0.drv' on 'ssh-ng://customer@mac02'