this derivation will be built:
  /nix/store/40al9dxwrp7pwq2mf9az14jc8qmb7fk9-treefmt-check.drv
building '/nix/store/40al9dxwrp7pwq2mf9az14jc8qmb7fk9-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 22 files
treefmt-check> emitted 10 files for processing
treefmt-check> formatted 10 files (0 changed) in 103ms