this derivation will be built:
  /nix/store/6bg8593rgnd7qh8g1rpil2w7n43av34f-treefmt-check.drv
building '/nix/store/6bg8593rgnd7qh8g1rpil2w7n43av34f-treefmt-check.drv'
treefmt-check> traversed 139 files
treefmt-check> emitted 70 files for processing
treefmt-check> formatted 70 files (0 changed) in 411ms