these 2 derivations will be built:
  /nix/store/a605d6y7zny4qb214rsr9bdhmm9axl15-closure-info.drv
  /nix/store/mb8jhza0as7zjzd5cq1nan9mwsd4cr8d-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy