this derivation will be built:
  /nix/store/rk2c2n4c5s97b5flk3xpaci9r4ngf3dw-treefmt-check.drv
building '/nix/store/rk2c2n4c5s97b5flk3xpaci9r4ngf3dw-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 941 files
treefmt-check> emitted 236 files for processing
treefmt-check> formatted 236 files (0 changed) in 581ms