this derivation will be built:
  /nix/store/bgxbl7ggw2g080yqs52v519sn3r6jn3x-nix-shell.drv
building '/nix/store/bgxbl7ggw2g080yqs52v519sn3r6jn3x-nix-shell.drv' on 'ssh-ng://builder@build04.clan.lol'
building '/nix/store/bgxbl7ggw2g080yqs52v519sn3r6jn3x-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok