these 2 derivations will be built:
  /nix/store/hhs51k8mgc86fgi6w95xz4s7bfz9axli-closure-info.drv
  /nix/store/lgahvlch6c68bfhwd77m26d206blvwz0-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy