this derivation will be built:
  /nix/store/j700qqvs02sx9qnz4ylwqyqi41mh5njq-nix-shell.drv
building '/nix/store/j700qqvs02sx9qnz4ylwqyqi41mh5njq-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok