this derivation will be built:
  /nix/store/z1lxplr4cp6p4n1cf0wja5rx599m1465-ubuntu-26.04-server-cloudimg-amd64v3.img.drv
building '/nix/store/7hyf8vqm03z7kd7m4k4fdpaqbcyaxfr1-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-20260927/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> 100 826.6M 100 826.6M   0      0 58.89M      0   00:14   00:14         58.15M

upload niks3: ok