this derivation will be built:
  /nix/store/mfkjnc7vwhh200yrknmqd0xxxgp3xvzp-flake-inputs.drv
building '/nix/store/mfkjnc7vwhh200yrknmqd0xxxgp3xvzp-flake-inputs.drv'

post-build step Upload to niks3: ok
time=2026-08-27T06:19:57.392Z level=INFO msg="Uploading 0 paths to niks3.numtide.com (7 already cached)"
time=2026-08-27T06:19:57.786Z level=INFO msg="Uploading 1 narinfos"
time=2026-08-27T06:19:58.166Z level=INFO msg="Upload complete. (919ms)"