this derivation will be built:
  /nix/store/m6j5m1z7dswcs5gb5lbvq5h70a8x9gzi-treefmt-check.drv
building '/nix/store/m6j5m1z7dswcs5gb5lbvq5h70a8x9gzi-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 14 files
treefmt-check> emitted 6 files for processing
treefmt-check> formatted 6 files (0 changed) in 72ms