these 3 derivations will be built:
  /nix/store/b01n21p1996v9lzvnnjppp8rgr7qd93s-treefmt.toml.drv
  /nix/store/v6vfv1igc3a2qj8kbngy7rgfgwkhbrj6-treefmt.drv
  /nix/store/jwg4qkgcvydr71s7xd89krari1alq9c2-treefmt-check.drv
this path will be fetched (1.1 MiB download, 5.1 MiB unpacked):
  /nix/store/6xhcjd8mz7s2sfnlkabrx1pnz6fmjygh-nixfmt-1.4.0
building '/nix/store/b01n21p1996v9lzvnnjppp8rgr7qd93s-treefmt.toml.drv'
treefmt.toml> structuredAttrs is enabled
treefmt.toml> 
building '/nix/store/v6vfv1igc3a2qj8kbngy7rgfgwkhbrj6-treefmt.drv'
building '/nix/store/jwg4qkgcvydr71s7xd89krari1alq9c2-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 21 files
treefmt-check> emitted 10 files for processing
treefmt-check> formatted 10 files (0 changed) in 96ms