this derivation will be built:
  /nix/store/rr1vdwi3jh3rlhnv1m09jjh6np3c4k2c-treefmt-check.drv
building '/nix/store/rr1vdwi3jh3rlhnv1m09jjh6np3c4k2c-treefmt-check.drv'
treefmt-check> traversed 550 files
treefmt-check> emitted 303 files for processing
treefmt-check> formatted 303 files (0 changed) in 1.497s

post-build step Upload to niks3: ok
time=2026-09-23T06:21:47.652Z level=INFO msg="Uploading 0 paths to 127.0.0.1 (1 already cached)"
time=2026-09-23T06:21:48.184Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-23T06:21:49.188Z level=INFO msg="Upload complete. (1.556s)"