this derivation will be built:
  /nix/store/fh3g4gx5sw6yzs4qamh4xz4mbbn2xw9i-treefmt-check.drv
building '/nix/store/fh3g4gx5sw6yzs4qamh4xz4mbbn2xw9i-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 30 files
treefmt-check> emitted 0 files for processing
treefmt-check> formatted 0 files (0 changed) in 43ms