this derivation will be built:
  /nix/store/b4imbwv20nfjk4fnnnw8hm73hgnsq6xi-nix-shell.drv
building '/nix/store/b4imbwv20nfjk4fnnnw8hm73hgnsq6xi-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok