this derivation will be built:
  /nix/store/5li8a11maxc9ikxp8afz7gpaxr33xg9i-treefmt-check.drv
building '/nix/store/5li8a11maxc9ikxp8afz7gpaxr33xg9i-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 19 files
treefmt-check> emitted 8 files for processing
treefmt-check> formatted 8 files (0 changed) in 607ms