these 2 derivations will be built:
  /nix/store/jsww15sfz9gimr0j1d4p46wfd1259nb2-closure-info.drv
  /nix/store/3xybsxsipgk17sa0jw5fdshzc675dpzb-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy