this derivation will be built:
  /nix/store/bm45xn6swbq1r9ygb2v9xr37q7wbhn9a-treefmt-check.drv
building '/nix/store/bm45xn6swbq1r9ygb2v9xr37q7wbhn9a-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 941 files
treefmt-check> emitted 235 files for processing
treefmt-check> formatted 235 files (0 changed) in 628ms