this derivation will be built:
  /nix/store/g9vzv8g6mr6qbd0fzf3ljpv7g9drd3rh-nix-shell.drv
building '/nix/store/g9vzv8g6mr6qbd0fzf3ljpv7g9drd3rh-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok