this derivation will be built:
  /nix/store/rnm1ixfnkywiw0x0ca0g1m2scn8np7ix-treefmt-check.drv
building '/nix/store/rnm1ixfnkywiw0x0ca0g1m2scn8np7ix-treefmt-check.drv'
treefmt-check> traversed 510 files
treefmt-check> emitted 273 files for processing
treefmt-check> formatted 273 files (0 changed) in 1.295s

post-build step Upload to niks3: ok
time=2026-09-21T08:37:15.880Z level=INFO msg="Uploading 0 paths to 127.0.0.1 (1 already cached)"
time=2026-09-21T08:37:16.051Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-21T08:37:16.109Z level=INFO msg="Upload complete. (250ms)"