these 3 derivations will be built:
  /nix/store/igf475h9j2rb84ffhy1mcz19g2r98f8j-treefmt.toml.drv
  /nix/store/5fhidb32f14wld2sys9y4d6wj9vx7h9c-treefmt.drv
  /nix/store/0b9rfbaj0imaffqsk2lzj08x8v8z967c-treefmt-check.drv
these 2 paths will be fetched (882.2 KiB download, 2.3 MiB unpacked):
  /nix/store/5q3q49rs3dzgqfkd9qh60l5g7lywngz8-nixf-2.9.1
  /nix/store/735al2zcsy788a1xmqrjwy22mav76c8k-nixf-diagnose-0.1.4
building '/nix/store/igf475h9j2rb84ffhy1mcz19g2r98f8j-treefmt.toml.drv'
treefmt.toml> structuredAttrs is enabled
treefmt.toml> 
building '/nix/store/5fhidb32f14wld2sys9y4d6wj9vx7h9c-treefmt.drv'
building '/nix/store/0b9rfbaj0imaffqsk2lzj08x8v8z967c-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 13 files
treefmt-check> emitted 9 files for processing
treefmt-check> formatted 9 files (0 changed) in 67ms