this derivation will be built:
  /nix/store/sl6c15smdibq7cs3skf203a13k53fw2h-treefmt-check.drv
building '/nix/store/sl6c15smdibq7cs3skf203a13k53fw2h-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 75 files
treefmt-check> emitted 68 files for processing
treefmt-check> formatted 68 files (0 changed) in 108ms

upload attic: ok
✍️ Overwriting server "r2d2"