this derivation will be built:
  /nix/store/p8xgjvfrp4l6qw40xz2mfgdays1qa77a-treefmt-check.drv
building '/nix/store/p8xgjvfrp4l6qw40xz2mfgdays1qa77a-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 929 files
treefmt-check> emitted 232 files for processing
treefmt-check> formatted 232 files (0 changed) in 591ms