this derivation will be built:
  /nix/store/340qkihll999vas4i6zd8fnxssq1z6f9-treefmt-check.drv
building '/nix/store/340qkihll999vas4i6zd8fnxssq1z6f9-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 770 files
treefmt-check> emitted 471 files for processing
treefmt-check> formatted 471 files (0 changed) in 845ms