these 2 derivations will be built:
  /nix/store/a8w5qd60jlblks5qn28bsy3zins23dnm-closure-info.drv
  /nix/store/fqw7xqlhibmd8an663v00vxkjhgiixf4-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy