this derivation will be built:
  /nix/store/5xmdvgx5c8zn7kn3yp93yma9n2z572s4-nix-shell.drv
building '/nix/store/5xmdvgx5c8zn7kn3yp93yma9n2z572s4-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok