this derivation will be built:
  /nix/store/k8p6c0msyc72iajqr5y5amfi9ppxsjgx-treefmt-check.drv
building '/nix/store/k8p6c0msyc72iajqr5y5amfi9ppxsjgx-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 14 files
treefmt-check> emitted 9 files for processing
treefmt-check> formatted 9 files (0 changed) in 137ms