this derivation will be built:
  /nix/store/n1nivvlxmj5ij6w8bp3l7p34q0wcpxf9-treefmt-check.drv
building '/nix/store/n1nivvlxmj5ij6w8bp3l7p34q0wcpxf9-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 944 files
treefmt-check> emitted 238 files for processing
treefmt-check> formatted 238 files (0 changed) in 835ms