this derivation will be built:
  /nix/store/1b5bprpdh3rjw2k6wxhn23sc9fzi0lzb-treefmt-check.drv
building '/nix/store/1b5bprpdh3rjw2k6wxhn23sc9fzi0lzb-treefmt-check.drv'
treefmt-check> traversed 391 files
treefmt-check> emitted 189 files for processing
treefmt-check> formatted 189 files (0 changed) in 1.039s

post-build step Upload to niks3: ok
time=2026-09-18T09:25:44.507Z level=INFO msg="Uploading 0 paths to 127.0.0.1 (1 already cached)"
time=2026-09-18T09:25:44.908Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-18T09:25:45.237Z level=INFO msg="Upload complete. (750ms)"