these 4 derivations will be built:
  /nix/store/6vymz3nlc19g27jnssz9f3ap76khwij6-system-units.drv
  /nix/store/kd025j2v02kpqi5a5aj8gw2g0i3b3dfl-etc.drv
  /nix/store/zdrgpvvqrjs9qwslakyysrwzdas19wyd-activate.drv
  /nix/store/x4mpw0fk32q34vcnw7sjfzx4xzzpx1vj-nixos-system-test-documentation-26.11.20260820.391b592.drv

post-build step Upload to niks3: ok
time=2026-08-21T20:03:06.837Z level=INFO msg="Uploading 2 paths to niks3.clan.lol (557 already cached)"
time=2026-08-21T20:03:06.837Z level=INFO msg="Uploading k3l29h5zgrq9bg5m483v4di1v88y7ygp-source (202.6MB)"
time=2026-08-21T20:03:06.837Z level=INFO msg="Uploading badbymprxif7xabwliq31hc7qz60flap-user-units (11.8KB)"
time=2026-08-21T20:03:10.289Z level=ERROR msg="Failed to close zstd encoder" error="io: read/write on closed pipe"
time=2026-08-21T20:03:10.291Z level=INFO msg="Uploading 13 narinfos"
time=2026-08-21T20:03:11.152Z level=INFO msg="Upload complete. (4.616s)"