this derivation will be built:
  /nix/store/rxb4gq1hah6fg6rvkcxrdr7a1j5bj7xq-treefmt-check.drv
building '/nix/store/rxb4gq1hah6fg6rvkcxrdr7a1j5bj7xq-treefmt-check.drv'
treefmt-check> traversed 439 files
treefmt-check> emitted 305 files for processing
treefmt-check> formatted 305 files (0 changed) in 3.195s

post-build step Upload to niks3: ok
time=2026-08-18T18:27:07.672Z level=INFO msg="Uploading 0 paths to niks3.numtide.com (1 already cached)"
time=2026-08-18T18:27:08.066Z level=INFO msg="Uploading 1 narinfos"
time=2026-08-18T18:27:08.512Z level=INFO msg="Upload complete. (946ms)"