this derivation will be built:
  /nix/store/i2hj7a7x91c6hckdlf6dn01cdyswcvnr-treefmt-check.drv
building '/nix/store/i2hj7a7x91c6hckdlf6dn01cdyswcvnr-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 943 files
treefmt-check> emitted 238 files for processing
treefmt-check> formatted 238 files (0 changed) in 622ms