this derivation will be built:
  /nix/store/00wkczaxl5yq6fi21slc2mk8hk5i3q2i-nix-shell.drv
building '/nix/store/00wkczaxl5yq6fi21slc2mk8hk5i3q2i-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok