this derivation will be built:
  /nix/store/mpws1zhv6h2cr67cdnldb1wvzcznpga7-nix-shell.drv
building '/nix/store/mpws1zhv6h2cr67cdnldb1wvzcznpga7-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok