this derivation will be built:
  /nix/store/01iplhkdym98hq0dkxml69n21gfihbqv-ubuntu-26.04-server-cloudimg-amd64v3.img.drv
building '/nix/store/gs27qrmvwzalijdrndcfpyz37jfh8hx1-ubuntu-26.04-server-cloudimg-amd64v3.img.drv'
ubuntu-26.04-server-cloudimg-amd64v3.img> structuredAttrs is enabled
ubuntu-26.04-server-cloudimg-amd64v3.img> 
ubuntu-26.04-server-cloudimg-amd64v3.img> trying https://cloud-images.ubuntu.com/releases/resolute/release-20260918/ubuntu-26.04-server-cloudimg-amd64v3.img
ubuntu-26.04-server-cloudimg-amd64v3.img>   % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
ubuntu-26.04-server-cloudimg-amd64v3.img>                                  Dload  Upload  Total   Spent   Left   Speed
ubuntu-26.04-server-cloudimg-amd64v3.img> 100 825.4M 100 825.4M   0      0 93.08M      0   00:08   00:08         99.18M

upload niks3: ok