this derivation will be built:
  /nix/store/hz3f8gf1bwkcqym4bw24zxs75r1iy5r3-treefmt-check.drv
building '/nix/store/hz3f8gf1bwkcqym4bw24zxs75r1iy5r3-treefmt-check.drv'
treefmt-check> traversed 477 files
treefmt-check> emitted 249 files for processing
treefmt-check> formatted 249 files (0 changed) in 1.213s

post-build step Upload to niks3: ok
time=2026-09-19T09:00:36.325Z level=INFO msg="Uploading 0 paths to 127.0.0.1 (1 already cached)"
time=2026-09-19T09:00:36.875Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-19T09:00:37.128Z level=INFO msg="Upload complete. (824ms)"