this derivation will be built:
  /nix/store/z3q5d7i87llf5ghxcgaa3i87snm44s0i-treefmt-check.drv
bld4: building z3q5d7i87llf5ghxcgaa3i87snm44s0i-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 15.871s