this derivation will be built:
  /nix/store/fp9im6nkq2nl9xy9r6nlgxk1fqswdwq0-treefmt-check.drv
building '/nix/store/fp9im6nkq2nl9xy9r6nlgxk1fqswdwq0-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 65 files
treefmt-check> emitted 42 files for processing
treefmt-check> formatted 42 files (0 changed) in 368ms