this derivation will be built:
  /nix/store/ag2klw7rhm3mp4j0qq4x0b6namq8lm61-treefmt-check.drv
building '/nix/store/ag2klw7rhm3mp4j0qq4x0b6namq8lm61-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 77 files
treefmt-check> emitted 70 files for processing
treefmt-check> formatted 70 files (0 changed) in 156ms

upload attic: ok
✍️ Overwriting server "r2d2"