this derivation will be built:
  /nix/store/rlbrbazz7a4jz6m6r3fcg4pxmvk4gkn4-treefmt-check.drv
bld4: building rlbrbazz7a4jz6m6r3fcg4pxmvk4gkn4-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 6.532s