this derivation will be built:
  /nix/store/mg5c5mlnfsm6ks1zh4h2qfl47cyfmbc3-flake-inputs.drv
building '/nix/store/mg5c5mlnfsm6ks1zh4h2qfl47cyfmbc3-flake-inputs.drv'

post-build step Upload to niks3: ok
time=2026-09-01T10:31:19.949Z level=INFO msg="Uploading 0 paths to niks3.numtide.com (7 already cached)"
time=2026-09-01T10:31:20.515Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-01T10:31:20.918Z level=INFO msg="Upload complete. (1.177s)"