this derivation will be built:
  /nix/store/8r2vc6wz6fy3dj92dvw1dkkm1mw0yd5a-treefmt-check.drv
building '/nix/store/8r2vc6wz6fy3dj92dvw1dkkm1mw0yd5a-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 938 files
treefmt-check> emitted 234 files for processing
treefmt-check> formatted 234 files (0 changed) in 620ms