these 2 derivations will be built:
  /nix/store/nzvcdac2drlzinpsznzsvszr80sfvv9y-flake-inputs.drv
  /nix/store/8v7iabs60qrwwndz0l9rbi9lwkf0z9pm-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy