this derivation will be built:
  /nix/store/12js42pxy7d6mhhrp7pcy6kpaj874fip-nix-shell.drv
building '/nix/store/12js42pxy7d6mhhrp7pcy6kpaj874fip-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok