this derivation will be built:
  /nix/store/vi80yzh3x6yi30hf8762vasppy0qyq94-treefmt.toml.drv
building '/nix/store/vi80yzh3x6yi30hf8762vasppy0qyq94-treefmt.toml.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=20&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/vi80yzh3x6yi30hf8762vasppy0qyq94-treefmt.toml.drv' on farm.numtide.com:50051
treefmt.toml> mac02: building vi80yzh3x6yi30hf8762vasppy0qyq94-treefmt.toml.drv
treefmt.toml> structuredAttrs is enabled