this derivation will be built:
  /nix/store/mayz80fiqwz8b8dfsxh8dd6pih2bsxgq-nix-shell.drv
building '/nix/store/mayz80fiqwz8b8dfsxh8dd6pih2bsxgq-nix-shell.drv'
nix-shell> Running phase: buildPhase
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy

upload niks3: ok