this derivation will be built:
  /nix/store/b0nx7vzk185rbi6k3ygzmvs3ii55zlsl-nix-shell.drv
building '/nix/store/b0nx7vzk185rbi6k3ygzmvs3ii55zlsl-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok