this derivation will be built:
  /nix/store/spk4vj3fgpnrqpgfdmvmkc3fpfbxw48m-treefmt-check.drv
building '/nix/store/spk4vj3fgpnrqpgfdmvmkc3fpfbxw48m-treefmt-check.drv'
treefmt-check> traversed 298 files
treefmt-check> emitted 150 files for processing
treefmt-check> formatted 150 files (0 changed) in 857ms

post-build step Upload to niks3: ok
time=2026-09-16T13:57:29.368Z level=INFO msg="Uploading 0 paths to 127.0.0.1 (1 already cached)"
time=2026-09-16T13:57:29.654Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-16T13:57:30.044Z level=INFO msg="Upload complete. (700ms)"