this derivation will be built:
  /nix/store/pzkfaf3kg85r6az3vl9n59cfsmq0013y-treefmt-check.drv
bld4: building pzkfaf3kg85r6az3vl9n59cfsmq0013y-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 11.847s