this derivation will be built:
  /nix/store/k4985yrhfpxkmp1w302vnafz0q2y5vng-nix-shell.drv
building '/nix/store/k4985yrhfpxkmp1w302vnafz0q2y5vng-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok