this derivation will be built:
  /nix/store/pp51g0v5855wfmbns23jdsq9k9qdlnln-nix-grpc-store-0.1.0.drv
building '/nix/store/pp51g0v5855wfmbns23jdsq9k9qdlnln-nix-grpc-store-0.1.0.drv' on 'ssh-ng://customer@mac02'
building '/nix/store/pp51g0v5855wfmbns23jdsq9k9qdlnln-nix-grpc-store-0.1.0.drv'