these 2 derivations will be built:
  /nix/store/ixkd0na091ibh2p7z6h4fpcjhp0szag0-closure-info.drv
  /nix/store/9himk5m3y4ymqvxylas0vigcbq48p59d-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