these 2 derivations will be built:
  /nix/store/hl06xxjgj70l7iklmr6289yjhn7j2yzl-closure-info.drv
  /nix/store/rbc97gpqmh77kk660cqqgckzpq1cbzbv-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy