these 2 derivations will be built:
  /nix/store/nlgh40kqlrl0v3ga8fg73w2cz704236x-closure-info.drv
  /nix/store/kgywv4lrl65kdaxlrmk4bnar1si5gw6h-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