this derivation will be built:
  /nix/store/lb7vn02z7ygj0zf7vwm5fyd44n99cxln-treefmt-check.drv
building '/nix/store/lb7vn02z7ygj0zf7vwm5fyd44n99cxln-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 939 files
treefmt-check> emitted 234 files for processing
treefmt-check> formatted 234 files (0 changed) in 3.503s