this derivation will be built:
  /nix/store/wag7wzrg14z55gqd140nap0yh81csg3l-nix-shell.drv
building '/nix/store/wag7wzrg14z55gqd140nap0yh81csg3l-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok