this derivation will be built:
  /nix/store/a39zrabpmak5vjn0gca1f1k6khqidbyn-nix-shell.drv
building '/nix/store/a39zrabpmak5vjn0gca1f1k6khqidbyn-nix-shell.drv' on 'ssh-ng://builder@build01.clan.lol'
building '/nix/store/a39zrabpmak5vjn0gca1f1k6khqidbyn-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok