this derivation will be built:
  /nix/store/pi6vc2a8kvkzk3fafs7cmbw5p8f34g2r-treefmt-check.drv
building '/nix/store/pi6vc2a8kvkzk3fafs7cmbw5p8f34g2r-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 943 files
treefmt-check> emitted 237 files for processing
treefmt-check> formatted 237 files (0 changed) in 633ms